VRay SDK, VRenderLight

[Morbid Angel]

this looks amaizing. An actual usable vray mesh light?... what is your plan on releasing this? will it be a plugin? free or not?

[Karba]

Noise is much stronger.
I don't know how to optimise sampling in accordance with material BRDF.

[rmejia]

Very nice work!

[Morbid Angel]

I am wondering if such optimization can be done to regular vray lights. For example having very large area lights also produce a lot of noise. Can this be done?

[vlado]

I am wondering if such optimization can be done to regular vray lights. For example having very large area lights also produce a lot of noise. Can this be done?

Rectangle and sphere lights already do it. Things will be better if you use GI with them (as the GI will help to sample the light more accurately).

Best egards,
Vlado

[Morbid Angel]

unfortunately with the complexity of our scenes and the render time we already have gi is hardly an option

[vlado]

It depends; if you limit the GI radius, it can work quite well. This is in V-Ray for Maya only at present though.

Best regards,
Vlado

[Morbid Angel]

so for fully animated objects and cameras would you suggest using irradience map or brute force?

[Karba]

How does AdaptiveColorSampler calculate actual samples count?

I mean, if we have N subdivs set by user, what sample count do we have for sampler. I think, it depend on AA subdivs, global subdivs multiplier, type of ray (GI, Glossy) and so on.

[Karba]

I was looking VRayContext class a lot. But i couldn't find, how I can get/calculate result subdivs multiplier.

[vlado]

It depends on many things, but the easiest way to find the actual number is simply to count the number of times the sampleColor() method is called. Also, after sampling is done, V-Ray will call the mulResult() method with the correct normalizing multiplier (1/numSamples and also taking into account any Russian roulette sampling).

Best regards,
Vlado

[Karba]

Thank you for answer.
Interesting way. But problem is, I don't want to use sampler, because samples count in my case depend on light amount of every light triangle.

Next question is, how to determine LC stage. For some reason LC speed depends on light subdivs in my case. But IrrMap doesn't.

[Karba]

Seems I solved problem

if(rc.rayparams.currentPass==RPASS_GI) subdivs = 2;

[Karba]

Now LC works fast too

[jacksc02]

Karba, how well does speedlight work with animated lights/GI?