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longedesigns

Nov. 2, 2021 06:02:09

Hello,

So i am wondering if it is possible to randomise specific attributes in the lighting settings across multiple lights using VEX in Solaris. Instead of using the lighting mixer to individually tweak each light.

I want to be about to randomise the lighting exposure or colour across multiple lights using vex. Jus not sure which attributs to pull in to control that function in vex.

Is this possible in Solaris?

Hamilton Meathouse

Nov. 2, 2021 15:52:17

There is a glimpse at doing some of that in this pixar video: https://youtu.be/hyxh0cp7y9Y?t=585 [youtu.be]

goldleaf

Nov. 2, 2021 18:32:43

That video demonstrates how to do it on the source points, when generating reference-copies of lights, and works great. You can also do it with a Wrangle in LOPs. Note that in the USD version that ships with H19, light parameters have an "inputs:" prefix, as they will soon be connectable for light shaders.

Just point the prim pattern at the lights you want to affect, and away you go!

@inputs:exposure = fit(random(@elemnum),0,1,0,3);
v@inputs:color = hsvtorgb(set(random(@elemnum),1,1));
@inputs:width = fit(random(@elemnum),0,1,0,1.5);
@inputs:height = fit(random(@elemnum),0,1,0.5,2.5);

HTH!

longedesigns

Nov. 3, 2021 06:11:29

Hey guys thanks for that im going to give it a try now in my scene.