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area light bug // Bugs

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Post by chrisj // Jul 18, 2007, 12:20am

chrisj
Total Posts: 239
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OK folks, after a bit of experimentation and comparison, I have now discovered 2 bugs, one in 7.1 , the other in 7.5.

The problem lies with area lights. I tend to use area lights to simulate window light, as for my study scene (see elsewhere in wip). I have now discovered that the falloff does not work in 7.1 at all. I normally use linear falloff for area sources, and set up intensity to suit. Images are identical for no-falloff, linear, and quadratic.

When I switch the same scene and settings to 7.5, with linear falloff, I find that the scene is completely washed out with light, and takes an age to render. If I set the area light to no-falloff, the scene renders almost identically to 7.1.

So, in conclusion, falloff for area lights does not work in 7.1.

In 7.5, the falloff actually increases the total amount of light exponentially, rather than reduce its effect.

Spot lights and omni lights appear to be OK (but I'll let you know).

Post by Jack Edwards // Jul 18, 2007, 12:54am

Jack Edwards
Total Posts: 4062
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Brighter scenes take longer to render in VRay.


Roman posted in his blog about there being a new version of VRay (1.52) being released soon. Maybe you'll see fixes for a lot of the problems you've been having when the new version comes out.


-Jack.
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