Caustics with SpotLight

V-Ray for 3ds Max V-Ray for 3ds Max :: Issues
1

Hello. Just trying to get caustics from spotlight with inverse square falloff. Only with caustics multipler of 56000 I can barely see it.

What I’m doing wrong ?

Here’s the scene. Max 2010. sp3a
41 t.zip (20.8 KB)

4t.jpg
4t.jpg640×480 6.23 KB

2

You have to set the “Start” parameter for the Inverse square decay to 1.0 generic units (not display units). Then you’ll need to boost the light multiplier a lot, but it will work.

Best regards,
Vlado

3

I’m shocked :smile:

But, can be spotlight simulated with vray mesh light ?

4

Is this an appropriate thread for me to beg for a more intuitive and simple to set up caustics system ? :slight_smile:

I struggle with it every time, and more often I just run out time or patience and give up. When it works it looks awesome, but I find it very hard to get consistent /predictable results.

b

5

That’s because photon mapping is not really the best technique for this stuff, but until we implement other algorithms, there isn’t much to be done.

Best regards,
Vlado

6

Are there any plans in motion to implement other algorithms for the next V-Ray version? I think you once mentioned bidirectional path tracing as an option for caustics instead of photon mapping. Would be nice to have alternative options for caustics; they always make renders look more fascinating :smile: