strange pink problem...

[s0real]

has anyone else come across this issue?

the render appears to be fine on the LC pass, but then turns out pink in the IRmap pass...



it's a revit model imported as fbx into max design 2012, with a mixture of revit and vray materials.
i'm using vray 2.30.01

scene is lit externally with vray sun + sky and has a few standard max spots internally.

if i do a region render the scene renders normally.
also, moving the camera slightly changes the 'pinkness'

[3DMK]

I had a similar issue a while ago.

If I remember I think it was a bugged material causing the problem with the IR map

Try rendering it with a GLOBAL OVERRIDE material of white to see if it's the material causing the problem. That should at least let you know if it is a material causing the issues or not.

Hope this helps

[vlado]

Do you get any warnings in the V-Ray messages window?

Best regards,
Vlado

[s0real]

thanks, getting quite a lot of "overbright or invalid color" warnings
could that be to do with using vray sun and sky with standard cameras and vray exposure control?

i'll have a go with the override material and see what i get.

[s0real]

grey override material gives no errors so almost certainly something to do with a material somewhere in the scene.

it's really weird - if i move the camera just a tiny bit and re-render, the problem goes away. but then if i hit render again on the same view without moving the camera it happens again?!

sometimes the entire scene get flooded with pink / blue / purple light, other times it's as if there's a strong light source somewhere in the scene that's on that just illuminates a small part of the render.

hope i don't need to go through all the materials one by one as there are loads.

i'll try converting all materials to vray mats and see what happens.

[s0real]

after converting to vray materials...

[vlado]

In that case it would be best to send the scene, or a part of it, to vray@chaosgroup.com - our support guys will help you out.

Best regards,
Vlado

[s0real]

thought i had the solution but the hunt continues...

i still think it must be a material problem - i've tried using the vray scene converter but it doesn't convert the autodesk materials that have imported with the revit model.

is there a way to convert these materials to vray materials?

[vlado]

is there a way to convert these materials to vray materials?

You can probably use this: http://www.scriptspot.com/3ds-max/sc...rial-converter

Best regards,
Vlado

[s0real]

ok. i think i've isolated the problem to the multimaterial applied to the lamp model in the linked scene - possibly the noise map on the glass...

http://www.sendspace.com/file/2tn8hv

[tashko.zashev]

We will look into it.
Thank you for the file!

[tashko.zashev]

Hi,
The "Multimat_73" material in your scene has "Autodesk Generic" material and "Autodesk Noise" map applied, which both are Mental ray. They can often produce errors ( Overbright) when you render them with V-Ray.
A solution is the Mental ray material/shader to be replaced with a V-Ray one.
Hopefully this will help.