Maya rendering with VRay gives white spots

[Anonymous]

Hello good people,

I am quite new to VRay. Maybe this is just a dump problem of me and could easily fixed with some adjustments in the render settings.

My scene is simple and it contains:

-A VRayDomelight with an outdoor HDRI

-A normal sphere with VRayMtl material

and using VRayBumpMtl(I did already try applying the bump map directly into my VRayMtl) to give my sphere a little bumps.

My sphere has a full Reflection color, and Reflection Glossiness.

And the problem happens when I map a normal texture file(black and white image) for my bumps into my VRayBumpMtl's "Map", and it is giving me white spots in my render.

The whitespot pixels have max color value.

I will provide as many images as I could, and I will really appreciate all of your help!

Thank you everyone!

[damaggio · Accepted solution]

Hi, make sure you are clamping your HDR in Vray tap>Color Mappind Clamp level to default 20 ,check Clamp output, this should be on by default.

A personal suggestion, keep max subdivisions to 8 and up, not 4.

Your Blinn Fresnel 5.0 seems way high, leave at default 1.6...higher values are used for metallic shaders.

Those white spots are called fireflies and usually happens from very hot HDR maps, so they invented the clamping option.

Good luck.

[Anonymous]

Hi Damaggio,

Thank you for your time for helping me!

Unfortunately the fireflies are still there in my render even after  I enabled the "Clamp out" and set "Clamp Level to 20". I even tried changing the "Clamp level" to 1 and reduced the IOR to 1.6.

I appreciate your further help and anyone else who may have an idea.

Thank you everyone!

[Anonymous]

UPDATED:

FIXED thank you damaggio for leading me in the right direction!!

CHeers my friend!

[damaggio]

Was that the right thing then?

Just wanted other users to understand the solution, you were not very clear kvefpxo.

Thanks.

[Anonymous · Accepted solution]

Hi damaggio,

So I followed your direction and was playing around in the color mapping section, then I enabled "subpixel mapping" and changed the Type to Exponential instead and it worked for me. Hope this will help others.

[patrickY3GAB]

Years later, this last bit has helped me today. Thank you all!