Colored Mesh lights?

[elon_wu]

Hi,

Any way to present colored Mesh lights?

Like this:

https://docs.arnoldrenderer.com/display/A5AFHUG/Mesh+Light

My mesh light can emit colored lighting, but the light itself is always white, even with very low intensity.

[peter.fagerberg]

Hi @Elon! I was a bit interested in your mesh light problem so I did a quick test (in C4DtoA 3.2.0 and Arnold core 6.1.0.0). Everything seems to work correctly on my end. The sphere is 100 % diffusion and 0 % specular and you can see if being affected by the mesh's light color.

But a funny thing I noticed is that the colored sections and their area of light influence seem to have an offset. No idea why this happens... 🙂

Was this what you're looking for or did I misunderstand your question??

[peter.fagerberg]

Yeah, I would be a little bit wary of using mesh lights as a light source, except in "simple" cases. Here's an example where I smoothed the RGB ramp driving the emissions and as you can see in the reflections the ramp is still very much a step interpolation. Mesh lights are cool but use with caution... 🙂

[elon_wu]

Hi, @Peter Fagerberg. Thank you for your reply. My problem actually came from a small oversight... and has been solved.

I'm also interested in the lose of control of the light influence in your test. Have you solved it? 🙂

[peter.fagerberg]

Good to hear that it worked out for you!

I'm sure the super-dudes (and dudettes?) at Arnold can provide a simple explanation for the behavior. Maybe it's just the way mesh-lights are supposed to work?