VRay SDK, VRenderLight

[Karba]

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

You can't animate light form and scale.

Test GI. LC+IrrMap

[jacksc02]

I was meaning the intensity.
Do the optimisations you have made cause issues with single frame GI?

[Karba]

I was meaning the intensity.
Do the optimisations you have made cause issues with single frame GI?

Optimisation just allow to calculate Direct Light faster. It doesn't affect GI algorithm.
You can animate intensity.

[Karba]

Next question is...

How to store info about shadow for RawShadow channel?

function eval(...) of VRenderLight returns just single color value. Where can I pass shadow value?

[Karba]

Problem was solved.
I used brdf->eval(...) incorrectly.

[vlado]

Ok, good to know

Best regards,
Vlado

[Karba]

Is any way to get maximum value of BRDFSampler and corresponding ray direction for this maximum?

[vlado]

You can call BRDFSampler::getLightMult() and BRDFSampler::getDiffuseColor() to get the general reflectance of the BRDF. However this will not give you any indication as to its maximum value or direction (in general the BRDF may have more than 1 maximum, or at least several peaks in different places; it is also not clear how you can get this information for layered materials).

However, for many BRDFs you can assume that the maximum is along the direction of the pure reflection from the surface - so you can simply evaluate the BRDF in that direction to get that maximum.

Best regards,
Vlado

[Karba]

Thank you for answer. I thought about calculation of reflection direction.
Finally It would be best to get set of random directions with density correspond to brdf intensity for given directions.

[vlado]

In principle you can use the getNewContext()/setupContext() methods of BRDFSampler for this purpose, however in SP5 they are not implemented for VRayMtl.

Best regards,
Vlado

[Karba]

I have a progress with glossy optimization.

[vlado]

Very nice

Best regards,
Vlado

[Karba]

[3Seventh]

Amazing stuff!! ...and amazing progess. Congrats!

[vlado]

How long does the regular V-Ray mesh light render them for (when using GI)?

Best regards,
Vlado