Lighting - Revision history

Byob: /* Area Lights and Mesh Lights */

2018-04-15T11:13:58Z

Area Lights and Mesh Lights

← Older revision		Revision as of 13:13, 15 April 2018
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	The most common way of lighting in LuxCoreRender is by using area lights. With this light you are able to simulate a wide range of lighting. It supports common settings such as power and color but also allows to control the spread angle, as well as the shape of the emitted light using IES files.		The most common way of lighting in LuxCoreRender is by using area lights. With this light you are able to simulate a wide range of lighting. It supports common settings such as power and color but also allows to control the spread angle, as well as the shape of the emitted light using IES files.

	Another common way is by using mesh lights. This type of light supports the same features as area lights~~, except laser,~~ but also features textured lighting. As mesh lights are objects, you can assign an entire object to emit light, such as the tungsten filament in a light bulb or halogen bulb. In general, it's advised to use mesh lights with as few faces as possible to keep render times down.		Another common way is by using mesh lights. This type of light supports the same features as area lights but also features textured lighting. As mesh lights are objects, you can assign an entire object to emit light, such as the tungsten filament in a light bulb or halogen bulb. In general, it's advised to use mesh lights with as few faces as possible to keep render times down.

	Objects only emit light in the direction that the normals of the object's faces are pointing.		Objects only emit light in the direction that the normals of the object's faces are pointing.

Byob: /* Area Lights and Mesh Lights */

2018-04-15T11:13:38Z

Area Lights and Mesh Lights

← Older revision		Revision as of 13:13, 15 April 2018
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	===Area Lights and Mesh Lights===		===Area Lights and Mesh Lights===

	The most common way of lighting in LuxCoreRender is by using area lights. With this light you are able to simulate a wide range of lighting. It supports common settings such as power and color but also spread angle, ~~opacity and laser~~.		The most common way of lighting in LuxCoreRender is by using area lights. With this light you are able to simulate a wide range of lighting. It supports common settings such as power and color but also allows to control the spread angle, as well as the shape of the emitted light using IES files.

	Another common way is by using mesh lights. This type of light supports the same features as area lights, except laser, but also features textured lighting. As mesh lights are objects, you can assign an entire object to emit light, such as the tungsten filament in a light bulb or halogen bulb. In general, it's advised to use mesh lights with as few faces as possible to keep render times down.		Another common way is by using mesh lights. This type of light supports the same features as area lights, except laser, but also features textured lighting. As mesh lights are objects, you can assign an entire object to emit light, such as the tungsten filament in a light bulb or halogen bulb. In general, it's advised to use mesh lights with as few faces as possible to keep render times down.

	Objects only emit light in the direction that the normals of the object's faces are pointing.		Objects only emit light in the direction that the normals of the object's faces are pointing.


	===Environment Lighting===		===Environment Lighting===

Piita at 17:17, 27 December 2017

2017-12-27T17:17:18Z

← Older revision		Revision as of 19:17, 27 December 2017
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	<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.		<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.
	-->		-->
	The [[External Resources\|External Resources]] page has some links to sites that offer free and quality HDR's. Also a simple web search for "hdri maps" or "hdr maps" will give a lot of results. You can also create your own hdri maps with LuxCoreRender by using the panorama camera.		The [[External Resources\|External Resources]] page has some links to sites that offer free and quality HDR's. Also a simple web search for "hdri maps" or "hdr maps" will give a lot of results. You can also create your own hdri maps with LuxCoreRender by using the [[LuxCoreRender_Cameras\|environment/panorama camera.]]

	For more information on environment mapping, see the [[Environment_map\|Environment map]] page		For more information on environment mapping, see the [[Environment_map\|Environment map]] page
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	'''Projector'''		'''Projector'''

	Both point lights and spot lights can distribute their light and color according to an image. With spot lights, this results in an effect like something being projected from a diapositive projector or beamer. With point lights, the image map is spherically mapped. <-- check if this works in luxcore		Both point lights and spot lights can distribute their light and color according to an image. With spot lights, this results in an effect like something being projected from a diapositive projector or beamer. With point lights, the image map is spherically mapped. <-- check if this works in luxcore

	~~[[Image:Projector.jpg\|frame\|left\|a room lit by a single projector]]<br clear="all" />~~

	~~[[Image:Lights-01.jpg\|frame\|left\|An example of point (left) spot (center) and area (right) light types]]~~
	~~<br clear="all" />~~

Piita at 19:32, 25 December 2017

2017-12-25T19:32:39Z

← Older revision		Revision as of 21:32, 25 December 2017
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	For more information on environment mapping, see the [[Environment_map\|Environment map]] page		For more information on environment mapping, see the [[Environment_map\|Environment map]] page

	<br clear="all"/>		<br clear="all"/>


	===Sun and Sky===		===Sun and Sky===
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	===IES data===		===IES data===
	With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. The renders below were lit with the same area light, only with different IES files. Some links to IES files can be found on the [[External Resources#IES lighting files\|external resources page]]~~. More~~ information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]		With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. The renders below were lit with the same area light, only with different IES files. Area lights, spot and point lights supports IES files. Some links to available IES files can be found on the [[External Resources#IES lighting files\|external resources page]] and more information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]

	<gallery mode="nolines" widths=200px heights=200px>		<gallery mode="nolines" widths=200px heights=200px>

Piita at 07:57, 25 December 2017

2017-12-25T07:57:44Z

← Older revision		Revision as of 09:57, 25 December 2017
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	===Environment Lighting===		===Environment Lighting===
	[[file:Lighting_environment_light.jpg\|left\|thumb\|250px\|Mirror material lit by a hemi lamp]]		[[file:Lighting_environment_light.jpg\|left\|thumb\|250px\|Mirror material lit by a hemi lamp]]
	Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. ~~LuxCoreRender supports this with the~~ hemi lamp and it accepts ~~both~~ latlong ~~and angular (light probe)~~ environment maps~~<!-- check this -->~~.		Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. The hemi lamp is used for this type of lighting and it accepts latlong environment maps.

	Environment lighting is usually done with HDR(high dynamic range) images but it is possible to use low dynamic range images (like JPG or PNG) as well, but in this case you may want to add some additional lighting to your scene to avoid getting a poorly contrast render. This is not necessary with HDR environment maps, which can be used as the only source of light to create a realistic lighting.		Environment lighting is usually done with HDR(high dynamic range) images but it is possible to use low dynamic range images (like JPG or PNG) as well, but in this case you may want to add some additional lighting to your scene to avoid getting a poorly contrast render. This is not necessary with HDR environment maps, which can be used as the only source of light to create a realistic lighting. Note that the hemi lamp's location in the scene does not matter, only its rotation.

	<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.		<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.
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	The sun and sky light creates a lighting setup that simulates the light of the sun and atmosphere, based on the direction of a sun light in the scene and a parameter named ''turbidity'' which defines the clearness of the sky. Both the sun angle and the sky clearness influence the color of the light.		The sun and sky light creates a lighting setup that simulates the light of the sun and atmosphere, based on the direction of a sun light in the scene and a parameter named ''turbidity'' which defines the clearness of the sky. Both the sun angle and the sky clearness influence the color of the light.

	~~[[Image:Sunsky~~.~~png\|frame\|left\|various~~ sun ~~angles result in different~~ sky ~~and light colors ]]~~		Note that the sun lamp is very bright (as it is in real life) so you may have to turn the Gain way down if you have other lights in the scene. The other lights may look like they are not even emitting, but they are actually overpowered by the sun. It is possible to use this light with sun only, sky only, or the default sun+sky. If you want softer shadows try adjusting the relative sun size parameter.<br/>
	<br ~~clear="all"~~ />		Note that the sun lamp's location in the scene does not matter, only its rotation.

	~~[[Image:Turbiditysettings.jpg\|frame\|left\|turbidity settings of 2, 4, 8 and 16, influencing both sky clarity and color]]~~<~~br clear~~="~~all~~" />		<gallery mode="nolines" widths=250 heights=250>
	~~Note that the sun~~ lamp ~~is very bright(as it is in real life) so you may have to turn the Gain way down if combined with other lights~~. ~~The other lights may look like they are not even emitting, but they are actually overpowered by the sun. It is possible to use this light with sun only, sky only, or the default sun~~+~~sky~~. ~~<br/>~~		Lighting_sun_angle_1.jpg\|Sun lamp angle 1
	~~If you want softer shadows try adjusting the relative sun size parameter.<br clear="all" />~~		Lighting_sun_angle_2.jpg\|Sun lamp angle 2
			Lighting_sun_angle_2_+_higher_turbidity.jpg\|Sun lamp angle 2 and higher turbidity

			</gallery>

	===Point Lights===		===Point Lights===

Piita at 13:18, 24 December 2017

2017-12-24T13:18:46Z

← Older revision		Revision as of 15:18, 24 December 2017
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	===Environment Lighting===		===Environment Lighting===
			[[file:Lighting_environment_light.jpg\|left\|thumb\|250px\|Mirror material lit by a hemi lamp]]
	Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. LuxCoreRender supports this with the hemi lamp and it accepts both latlong and angular (light probe) environment maps<!-- check this -->.		Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. LuxCoreRender supports this with the hemi lamp and it accepts both latlong and angular (light probe) environment maps<!-- check this -->.

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	For more information on environment mapping, see the [[Environment_map\|Environment map]] page		For more information on environment mapping, see the [[Environment_map\|Environment map]] page

			<br clear="all"/>
	~~[[Image:Lightingtypes.jpg\|frame\|left\|lighting using HDRI maps (left two images), a physical sky and an infinite environment (right). HDRI maps by Doug Hammond]]~~<br clear="all" />

Piita at 10:58, 24 December 2017

2017-12-24T10:58:51Z

← Older revision		Revision as of 12:58, 24 December 2017
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	===Environment Lighting===		===Environment Lighting===
	Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. LuxCoreRender accepts both latlong and angular (light probe) environment maps<!-- check this -->.
			Environment lighting encloses the scene entirely, lighting it from all angles. It is normally used for environment mapping, although it can also be used to add a solid color environment. LuxCoreRender supports this with the hemi lamp and it accepts both latlong and angular (light probe) environment maps<!-- check this -->.

	Environment lighting is usually done with HDR(high dynamic range) images but it is possible to use low dynamic range images (like JPG or PNG) as well, but in this case you may want to add some additional lighting to your scene to avoid getting a poorly contrast render. This is not necessary with HDR environment maps, which can be used as the only source of light to create a realistic lighting.		Environment lighting is usually done with HDR(high dynamic range) images but it is possible to use low dynamic range images (like JPG or PNG) as well, but in this case you may want to add some additional lighting to your scene to avoid getting a poorly contrast render. This is not necessary with HDR environment maps, which can be used as the only source of light to create a realistic lighting.
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	<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.		<!--When using environment maps, using a gamma value of 1.0 (instead of the usual 2.2) is recommended. The exception to this is if you want the environment to look exactly like the map itself did in your image editor. This is probably not the case if you are using an actual HDR map.
	-->		-->
	~~You can find a lot of~~ free quality HDR ~~maps on the~~ web ~~by looking~~ for ~~"hdr maps"/~~"hdri maps" or "~~light probes~~".		The [[External Resources\|External Resources]] page has some links to sites that offer free and quality HDR's. Also a simple web search for "hdri maps" or "hdr maps" will give a lot of results. You can also create your own hdri maps with LuxCoreRender by using the panorama camera.

	For more information on environment mapping, see the [[Environment_map\|Environment map]] page		For more information on environment mapping, see the [[Environment_map\|Environment map]] page
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	===Sun and Sky===		===Sun and Sky===

	The sun and sky light creates a lighting setup that simulates the light of the sun and atmosphere, based on the direction of a sun light in the scene and a parameter named ''turbidity'' which defines the clearness of the sky. Both the sun angle and the sky clearness influence the color of the light.		The sun and sky light creates a lighting setup that simulates the light of the sun and atmosphere, based on the direction of a sun light in the scene and a parameter named ''turbidity'' which defines the clearness of the sky. Both the sun angle and the sky clearness influence the color of the light.

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	[[Image:Turbiditysettings.jpg\|frame\|left\|turbidity settings of 2, 4, 8 and 16, influencing both sky clarity and color]]<br clear="all" />		[[Image:Turbiditysettings.jpg\|frame\|left\|turbidity settings of 2, 4, 8 and 16, influencing both sky clarity and color]]<br clear="all" />
	~~The intensity of the light can be set with the ''gain'' parameter. This is useful in scenes where the sun and sky light is combined with area/mesh lights.~~ Note that the sun lamp is very bright(as it is in real life) so you may have to turn it way down if combined with other lights. The other lights may look like they are not even emitting, but they are actually overpowered by the sun.<br/>		Note that the sun lamp is very bright(as it is in real life) so you may have to turn the Gain way down if combined with other lights. The other lights may look like they are not even emitting, but they are actually overpowered by the sun. It is possible to use this light with sun only, sky only, or the default sun+sky. <br/>
	If you want softer shadows try adjusting the relative sun size parameter.<br clear="all" />		If you want softer shadows try adjusting the relative sun size parameter.<br clear="all" />

	~~It is possible to use this light with only the sky, or only the sun.~~


	===Point Lights===		===Point Lights===
	Point lights are infinitely small light sources that emit light in all directions. ~~Apart from their location, the only available setting is ''color'', which can also be used to regulate intensity.~~		Point lights are infinitely small light sources that emit light in all directions. In most cases, it's recommended to use only mesh/area lights and environmental lighting for your scene, rather than point or spot lights. This is because the point and spot lights have no real world equivalent as the light source is an infinitely small point. As a result, they tend to produce unnaturally hard lighting and sharp shadows.

	In most cases, it's recommended to use only mesh/area lights and environmental lighting for your scene, rather than point or spot lights. This is because the point and spot lights have no real world equivalent as the light source is an infinitely small point. As a result, they tend to produce unnaturally hard lighting and sharp shadows.


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	-->		-->

			[[LuxCoreRender User%27s Manual\|Back to LuxCoreRender User's Manual]]

Piita: /* IES data */

2017-12-23T21:03:43Z

IES data

← Older revision		Revision as of 23:03, 23 December 2017
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	===IES data===		===IES data===
	With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. Some links to IES files can be found on the [[External Resources#IES lighting files\|external resources page]]. More information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]		With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. The renders below were lit with the same area light, only with different IES files. Some links to IES files can be found on the [[External Resources#IES lighting files\|external resources page]]. More information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]

	<gallery mode="nolines" widths=200px heights=200px>		<gallery mode="nolines" widths=200px heights=200px>
	Lighting_IES_example_1.jpg		Lighting_IES_example_1.jpg
			Lighting_IES_example_4.jpg
	Lighting_IES_example_2.jpg		Lighting_IES_example_2.jpg
			Lighting_IES_example_3.jpg

	</gallery>		</gallery>

Piita at 07:09, 23 December 2017

2017-12-23T07:09:51Z

← Older revision		Revision as of 09:09, 23 December 2017
Line 59:		Line 59:

	===IES data===		===IES data===
	With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. More information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]		With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. Some links to IES files can be found on the [[External Resources#IES lighting files\|external resources page]]. More information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]

	~~IES_examples image~~		<gallery mode="nolines" widths=200px heights=200px>
			Lighting_IES_example_1.jpg
			Lighting_IES_example_2.jpg
			</gallery>

	<br clear="all" />		<br clear="all" />

Piita at 16:19, 12 December 2017

2017-12-12T16:19:00Z

@@ Line 59: / Line 59: @@
 ===IES data===
-IES files contain information about the light distribution of a lighting fixture. These files are typically provided by lighting fixture manufacturers.
+With the help of IES files you can get the light distribution pattern of a real light fixture. This will keep render times down as you don't need a reflector or glass material to replicate the pattern. More information about IES files and how to create your own can be found here: [[Lighting_With_IES_Files]]
-[[Image:IES_examples.jpg|frame|left|a number of IES data files]]
+IES_examples image
 <br clear="all" />
-The main use of IES is measuring real world lamp models, many manufacturers sites offer their IES library for free. Generic IES can also be made with applications like "ies generator". Since IES profiles can be applied to mesh lights and area lights, they can be used to control the light spread angle, much like a spotlight cone. Area lights with the IES profile of a spot will illuminate like a spot but will have a physical size. This will make them easier to balance in intensity with other physical lights.
+<!--
-However, to have the physical intensity of a specific IES scaled correctly, the IES must be used with point lights (mesh and planes will still make the correct 'shape', but the intensity will be altered by their power, efficiency and size)
+===Color and Spectrum===
-[[Image:Lightcones2.JPG]]
+-->