BlendLuxCore LightPanel - Revision history

Byob: /* IES File */

2018-04-15T11:10:17Z

IES File

← Older revision		Revision as of 13:10, 15 April 2018
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	IES files are text files that allow to control the shape of the emitted light of a lamp.		IES files are text files that allow to control the shape of the emitted light of a lamp.
	They are supported by the point and area lamps.		They are supported by the point and area lamps and by the emission material node.
	You can find a few links to sites offering IES files for download on the [[External_Resources \| External Resources]] page.		You can find a few links to sites offering IES files for download on the [[External_Resources \| External Resources]] page.

Byob: /* IES File */

2018-04-15T11:09:39Z

IES File

← Older revision		Revision as of 13:09, 15 April 2018
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	== IES File ==		== IES File ==

	IES files allow to control the shape of the emitted light of a lamp.		IES files are text files that allow to control the shape of the emitted light of a lamp.
	They are supported by the point and area lamps.		They are supported by the point and area lamps.
			You can find a few links to sites offering IES files for download on the [[External_Resources \| External Resources]] page.
	IES files ~~are text files~~.

	In BlendLuxCore, you can either link to an IES file in your filesystem somewhere, or you can copy the contents of the IES file into a text block inside Blender and select the text block as IES source in the lamp settings.		In BlendLuxCore, you can either link to an IES file in your filesystem somewhere, or you can copy the contents of the IES file into a text block inside Blender and select the text block as IES source in the lamp settings.
	The latter option has many advantages over simply linking to a file on disk.		The latter option has many advantages over simply linking to a file on disk.

Byob: /* IES File */

2018-04-15T11:08:05Z

IES File

@@ Line 96: / Line 96: @@
 == IES File ==
-todo
+IES files allow to control the shape of the emitted light of a lamp.
 == Performance ==

Byob: /* Area */

2018-04-15T11:00:07Z

Area

← Older revision		Revision as of 13:00, 15 April 2018
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	[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]		[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]

	'''Visible to Camera:''' ~~todo~~		'''Visible to Camera:''' The area light is actually a meshlight (two triangles forming a plane). This setting controls if the mesh is visible to the camera or not. It is just a shortcut for the same setting in the [[BlendLuxCore_ObjectPanel \| LuxCore Object Setting]].

	'''Spread Angle:''' ~~todo~~		'''Spread Angle:''' How directional the light is emitted, set as the half-angle of the light source.
			Default is 90°. Smaller values mean that more light is emitted in the direction of the light and less to the sides.
			Note that very small spread angles can be problematic to sample and might lead to noise in the scene or no light being emitted at all if the light source is very small.
			If you need a very small spread angle, consider using a custom IES file instead.
			If you need parallel light rays, use the laser option of the area light instead (see below).

	'''Shape/Size:''' See the [https://docs.blender.org/manual/en/dev/render/cycles/lamps.html#area-lamp Blender manual].		'''Shape/Size:''' See the [https://docs.blender.org/manual/en/dev/render/cycles/lamps.html#area-lamp Blender manual].

Byob: /* Sun */

2018-04-15T10:52:19Z

Sun

← Older revision		Revision as of 12:52, 15 April 2018
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	Emits parallel light rays, so the position of the sun in the scene does not matter - only the rotation matters.		Emits parallel light rays, so the position of the sun in the scene does not matter - only the rotation matters.

	If you are using a [[BlendLuxCore_WorldPanel#Sky_Settings \| sky lamp for your world]], you should link the sun to the sky. This is a convenience mechanism and allows to set the gain, rotation and turbidity of both sun and sky simultaneously.		If you are using a [[BlendLuxCore_WorldPanel#Sky_Settings \| sky lamp for your world]], you should link the sun to the sky. This is a convenience mechanism and allows to set the gain, rotation and turbidity of both sun and sky simultaneously. You can link the sun either by pressing the "Attach to Sky" button in the sun settings or by going to the world panel and selecting it in the "Sun" dropdown field.

	'''Sun type:''' "Sun" or "Distant".		'''Sun type:''' "Sun" or "Distant".
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	* '''Distant:''' Simulates a light source that is infinitely far a way, but does not simulate interaction with an atmosphere. Can be used to simulate a near star in space when rendering science-fiction scenes.		* '''Distant:''' Simulates a light source that is infinitely far a way, but does not simulate interaction with an atmosphere. Can be used to simulate a near star in space when rendering science-fiction scenes.

	'''Relative Size:''' ~~todo~~		'''Relative Size:''' Size of the sun. Larger values lead to softer shadows.

	'''Turbidity:''' "Foggyness" of the atmosphere. A low turbidity value simulates a day with very clear air, while a high turbidity value simulates a high amount of fog/particles/dust/smog in the air.		'''Turbidity:''' "Foggyness" of the atmosphere. A low turbidity value simulates a day with very clear air, while a high turbidity value simulates a high amount of fog/particles/dust/smog in the air.

Byob: /* Performance */

2018-04-13T22:29:12Z

Performance

← Older revision		Revision as of 00:29, 14 April 2018
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	When you manually set the importance, you usually also want to set the light strategy to ''uniform'' (so you have full control on how the lights are sampled).		When you manually set the importance, you usually also want to set the light strategy to ''uniform'' (so you have full control on how the lights are sampled).

	'''Build Visibility Map:''' (only ~~visible~~ if light type is Hemi) If enabled, the [[Visibility_Map \| visibility map]] for the environment light source is computed at the start of a final render (not in viewport).		'''Build Visibility Map:''' (only available if light type is Hemi) If enabled, the [[Visibility_Map \| visibility map]] for the environment light source is computed at the start of a final render (not in viewport).

	== Visibility ==		== Visibility ==

Byob: /* Performance */

2018-04-13T22:28:28Z

Performance

← Older revision		Revision as of 00:28, 14 April 2018
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	When you manually set the importance, you usually also want to set the light strategy to ''uniform'' (so you have full control on how the lights are sampled).		When you manually set the importance, you usually also want to set the light strategy to ''uniform'' (so you have full control on how the lights are sampled).

	'''Build Visibility Map:''' If enabled, the [[Visibility_Map \| visibility map]] for the ~~world~~ light source is computed at the start of a final render (not in viewport).		'''Build Visibility Map:''' (only visible if light type is Hemi) If enabled, the [[Visibility_Map \| visibility map]] for the environment light source is computed at the start of a final render (not in viewport).

	== Visibility ==		== Visibility ==

Byob at 22:27, 13 April 2018

2018-04-13T22:27:29Z

← Older revision		Revision as of 00:27, 14 April 2018
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	== Power/Efficacy ==		== Power/Efficacy ==

	(Only ~~visible~~ when light type is point, spot or area)		(Only available when light type is point, spot or area)

	'''Power:''' The lamp power in [https://en.wikipedia.org/wiki/Watt watts].		'''Power:''' The lamp power in [https://en.wikipedia.org/wiki/Watt watts].
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	== Visibility ==		== Visibility ==

	(Only ~~visible~~ when sun or hemi type is selected)		(Only available when sun or hemi type is selected)

	Here you can enable/disable the visibility of the world background to the three light bounce types.		Here you can enable/disable the visibility of the world background to the three light bounce types.

Byob at 22:26, 13 April 2018

2018-04-13T22:26:40Z

← Older revision		Revision as of 00:26, 14 April 2018
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	[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]		[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]

	'''Spot Size:''' ~~todo~~		'''Spot Size/Blend:''' See the [https://docs.blender.org/manual/en/dev/render/cycles/lamps.html#spot-lamp Blender manual].

	~~'''Spot Blend:''' todo~~		'''Image:''' If an image is selected, the spot light is turned into a projector. In this mode it will emit light in a rectangular pyramid frustum, not a round cone as without image.

	'''Image:''' ~~todo~~

	== Hemi ==		== Hemi ==
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	'''Spread Angle:''' todo		'''Spread Angle:''' todo

	'''Shape:''' ~~todo~~		'''Shape/Size:''' See the [https://docs.blender.org/manual/en/dev/render/cycles/lamps.html#area-lamp Blender manual].

	~~'''Size~~:~~''' todo~~

	[[BlendLuxCore_LightPanel#IES_File \| '''IES File''']]		[[BlendLuxCore_LightPanel#IES_File \| '''IES File''']]

	'''Laser:''' ~~todo~~		'''Laser:''' Turns this lamp into a laser that emits parallel light rays that start at its location (as opposed to the sun/distant lamps, which also emit parallel light rays but are always infinitely far away).
			The area lamp was chose to represent this LuxCore light because it can visualize the laser light radius. However the laser light source will emit light in a circle shape, not quadratic like the area lamp shows in the OpenGL viewport.

	== Power/Efficacy ==		== Power/Efficacy ==
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	(Only visible when light type is point, spot or area)		(Only visible when light type is point, spot or area)

	'''Power:''' ~~todo~~		'''Power:''' The lamp power in [https://en.wikipedia.org/wiki/Watt watts].

	'''Efficacy:''' ~~todo~~		'''Efficacy:''' The [https://en.wikipedia.org/wiki/Luminous_efficacy luminous efficacy] in lumens/watt.

	== IES File ==		== IES File ==

Byob at 22:17, 13 April 2018

2018-04-13T22:17:00Z

← Older revision		Revision as of 00:17, 14 April 2018
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	[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]		[[BlendLuxCore_LightPanel#Power/Efficacy \| '''Power/Efficacy''']]

	'''Radius:''' ~~todo~~		'''Radius:''' Defines the size of the point lamp. If greater than zero, the point lamp is a sphere, but only in shadow and reflection calculations. It can not be viewed directly, so it will always be invisible to direct camera rays. A higher radius leads to softer shadows.

	[[BlendLuxCore_LightPanel#IES_File \| '''IES File''']]		[[BlendLuxCore_LightPanel#IES_File \| '''IES File''']]

	'''Image:''' ~~todo~~		'''Image:''' Projected spherically. If black/white, it can be used similarly to an IES file to drive the emitted light distribution. If the image is colored, the point light acts like a spherical projector.

	== Sun ==		== Sun ==

	'''Sun type:''' ~~todo~~		Emits parallel light rays, so the position of the sun in the scene does not matter - only the rotation matters.

			If you are using a [[BlendLuxCore_WorldPanel#Sky_Settings \| sky lamp for your world]], you should link the sun to the sky. This is a convenience mechanism and allows to set the gain, rotation and turbidity of both sun and sky simultaneously.

			'''Sun type:''' "Sun" or "Distant".
			* '''Sun:''' Simulates a physical sun, as viewed through the earth's atmosphere.
			* '''Distant:''' Simulates a light source that is infinitely far a way, but does not simulate interaction with an atmosphere. Can be used to simulate a near star in space when rendering science-fiction scenes.

	'''Relative Size:''' todo		'''Relative Size:''' todo

	'''Turbidity:''' ~~todo~~		'''Turbidity:''' "Foggyness" of the atmosphere. A low turbidity value simulates a day with very clear air, while a high turbidity value simulates a high amount of fog/particles/dust/smog in the air.

	== Spot ==		== Spot ==