Blue dots in glossies...

[rfellers]

With glossey reflections I get this...



If I turn glossies off it renders fine. I've looked all through the scene and converted any and all materials to vraymtl and made sure there are no raytrace maps. Any other solutions?

Ryan

[dimo]

Hi,

do you have shadow maps somewhere?

Best Regards,

Dieter

[rfellers]

No shadow maps - all lighting via Vray lights and Vray Light Material.

[RErender]

Make sure the fog and other color values in the mat are less than 255

[rfellers]

After a lot of stripping out different parts of the scene I have narrowed it down to the lighting setup. It is a dusk shot that uses 6 vraylights. One light is spherical and represents the low sun. The other 5 lights are rectangular and are placed inside the building to create the interior lighting. This piece of glass though has a box behind it with a vraylight material applied (the rectangular Vraylights are at the other end of the building). When I delete the 5 rectangular vraylights on the other side of the building, the problem disappears. The rectangular vraylights are placed a few inches above the ground and point up to illuminate the ceiling. Anyone ever seen this?

[dimo]

Hi,
I once had similar dots in a scene with lots of glossy reflections. The cause were lights with shadow maps. Vlado said it's a bug with shadow maps. They don't behave right if they are perpendicular to a surface. it helped to move them slightly up. But i never saw this happen with vraylights.

Dieter

[andrewjohn81]

does this happen without using light cache?

If not, then you probably just have to do without.


What I did as a solution is to exclude the objects from GI, then used an overbright material for the glossy so that it "matched"
I know that sometimes has it's own set of problems, but it worked for me a couple times when I needed glossy refraction and GI.

[jacksc02]

Ryan, exclude the glossy refractive object from generating GI that should help with the spots

[Candelero]

Post the material setup of the buggy geometry, where the dots appear.

Best regards,
nikki Candelero

[rfellers]

At the last minute the client decided to go with a daytime shot so I reconfigured the lights and this is no longer an issue for me now. If anyone wants to observe the problem though, here is a stripped down version of the file I was having problems with (Max 8 SP3 - VRay Adv 1.47.03)...

http://www.fellers.net/pub/BlueDots.zip

Ryan