Strange shader behavior on objects

Second Technician Rimmer

I have got some props here which were designed for Poser originally. When rendered in iRay, they will come out very saturated unless I place an actual light in the scene. Using emissive surfaces doesn't work. I have tried converting the surfaces in Uber iray but to no avail.

Any ideas? :)

Richard Haseltine

Does it depend on the type of light added? Is the environment dome on? There really isn't that much information to go on.

Second Technician Rimmer

I tinkered with it a bit more. Apparently, it will render properly only if the environment mode doesn't include the "scene" element. It works with: "dome only" and "sun/sky only" but goes nuts if you do a "scene only" or a "dome and scene". In that case of figure, no light is loaded in the scene I created.

If I switch to a "scene only" or a "dome and scene" environment type, the only way to make the prop render is to include a light (spotligh, distant...) and then the render will have normal colors.

All of this was done with the headlamp off.

Mattymanx

I would check the UV map of the item as well

Second Technician Rimmer

Hmm What do you mean exactly Matty? The prop's uvmap is set as "default" and no other option seems available.

AlmightyQUEST

Do you have a screen shot? I know you said the headlamp was off, but what you are describing sounds a lot like the headlamp being on without being able to see what you mean.

Second Technician Rimmer

Sure: https://imgur.com/a/gWygvMM

I hope it's ok to link; I couldn't embed it in my post directly.

AlmightyQUEST

Oh, right, when converting to the iray Uber shader, is the emission color on the surface anything other than completely black?

Though I realize now you said the scene and dome works if you have another light in the scene. That shouldn't be it if that's the case, but worth checking.

Second Technician Rimmer

I checked, the emission is set to black.