There are no resources for making light shaders anywhere, either as code or in a VOP.
I'd like to make an area light that has directionality control, similar to Vray and 3Delight.
So rays are not just cast in an increasing hemisphere from the center of the area light.
This can pull those rays more parallel, a very handy feature.
I've checked the math, it's entirely possible, but there seems to be nothing other than the actual
vfl files to go off from existing lights.
Does anyone has some knowledge they'd like to share?
Mantra Light Shaders321 3 1
I made a light shader with directionality before, but it's useless as the sampler has no idea about the light shader's bias. The more you increase directionality the noisier the image gets, until you get a black image with one or two hot pixels. If anyone knows how to teach the sampler about your light shader's importance distribution, it would make it far more viable.
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