Difference between revisions of "BlendLuxCore FAQ"

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== When I make one of my lights brighter, all the other lights get darker (or vice versa) ==
== When I make one of my lights brighter, all the other lights get darker (or vice versa) ==


Similar to [[#"When I change the brightness of my lamp, nothing happens"]].  
Similar to [[#"When I change the brightness of my lamp, nothing happens"]].<br>
You are using an automatic tonemapper which tries to keep the image at the same brightness, making it seem like the brightness of the lamps changed.
You are using an automatic tonemapper which tries to keep the image at the same brightness, making it seem like the brightness of the lamps changed.



Revision as of 15:05, 16 January 2018

Frequently Asked Questions

Why is my area lamp black?

See #"Why is my HDRI environment black and not showing up?"

Why is my HDRI environment black and not showing up?

You probably have other very bright light sources in the scene, for example a sun or a sky lamp.

Solution: raise the gain value of the area or HDRI light source that is black. The gain value might need to be very high, e.g. 100000.

When I change the brightness of my lamp, nothing happens

You are probably using an automatic tonemapper which adjusts itself to the changed brightness, making it seem like the brightness did not change.

Solution: Use a non-automatic tonemapper.

When I make one of my lights brighter, all the other lights get darker (or vice versa)

Similar to #"When I change the brightness of my lamp, nothing happens".
You are using an automatic tonemapper which tries to keep the image at the same brightness, making it seem like the brightness of the lamps changed.

Solution: Use a non-automatic tonemapper.

A material/object appears to be flickering when I move the camera and shows artifacts in final render

This effect is called Z-fighting and is usually caused by mesh faces being exactly on top of each other, e.g. two planes on the same world coordinates.

Solution:

  • Check if there are two objects on top of each other, e.g. because you duplicated the object, cancelled the transform and forgot about it.
  • Check if the mesh has duplicate faces. Enter edit mode and use the Remove Doubles button in the Tools panel, which might solve the problem in some cases.

Duplicate faces are often caused by extruding, cancelling the transform and forgetting about it.