red dots in glass

[super gnu]

http://img215.exs.cx/img215/8814/reddots6lo.jpg

anyone any idea what this is? the glass is single faces, with reflect on back side turned on... my bounce depth is set to 2, its a pre-saved irradiance map, with qmc lighting for the people (works great!)

however, i have about three days to finish this and these red dots have just turned up..

[vlado]

Do you use RPC for the people? If yes, does it render fine without them?

Best regards,
Vlado

[super gnu]

no, the people are 3d models, with "use irradiance map" turned off, forcing them to do qmc lighting..

[natty]

there's no bad mats ? ..... vray version ? check all the obvious..

[super gnu]

well im using vray 1.46.15, and of the several hundred materials in the scene, ive checked the glass and looked for double faces, but the thing is i didnt get this problem before using the qmc lighting technique for the people... ( i dont think : trying to get this and 6 other scenes ready to render at the same time... head is baking a bit.. been on this same job for ..eek. .5 months. got one week left...

[natty]

and were do the people come from ?? ... try converting them to poly .. might be bad cad data ..

[super gnu]

ahh they are modelled in maya and imported as polys... doesnt appear to be anything wrong with the meshes tbh, its about the tenth time ive used them...

thanks for prompt replies guys, get to the bottom of this somehow!

[super gnu]

hmm, well its not bounce depth, antialiasing or qmc subdivs.. i also get a "material overbright" error, but then i could well have got that anyway, its quite a common one...

[natty]

If you want you can mail me part of the scene and i'll take a look ... upto you dude.

[super gnu]

thanks for the offer mate. if i cant fix it by the end of the day ill see if i can strip out a bit of the scene to send over... trouble is at the moment its 150 mb plus 2 gb textures, so a fair amount of work to strip, whilst trying to keep the problem...

anyway, thx a lot for your help, im actually considering trying to just color correct them out in combustion, since the camera is moving quite fast and that door isnt in view too much... obviously id rather i could fix it tho...

[natty]

cool ... no probs .

[natty]

well funny thing over here ... just had the same problem spoke to vlado and it turns out to be a UVW Mapping problem... a small object wasnt mapped causing the red spots ...so you may want to run through your scene..

[Paul Oblomov]

The same ONE red dot over glossy material (two objects reflecting each other). Very fine detail settings. The first time I see that dot.

BTW None of them are mapped (just plain vehicle rim with brake support - there's nothing to map at all) nor are cad imported (poly modelled). Irrmap were used in conjunction with lightmap(cache) plain adaptive AA

vr 1.46.15

[natty]

something still may need UVW coordinates..

[vlado]

Dots can sometimes happen with the Ward BRDF for the VRay material; this has been corrected already, but in the meantime you can try and use Blinn or Phong.

Best regards,
Vlado