GI Lighting through glass help

[irobert]

Hi,

I have a scene that I am rendering out right now. I am having some trouble with the GI or Light settings. I basically have a red light light, a piece of glass on top of it, and then GI turned on to have the red light scatter out from the glass (picture below) In my render I am getting these little 1 pixel red dots from this light all over the other reflective models (ie the metal bars in the background).

I was wondering if someone could point me in the direction on what setting would get rid of these. I tried increasing the overall subdiv multiplyer to 4, but that did not effect the dots.

Thanks for any suggestions.

[irobert]

Had a few hours to mess with this tonight. Turning on Subpixel Mapping seemed to get rid of the spots. Is there any case where you wouldn't want to turn on Subpixel mapping?

[pechart]

You could also try to turn on the clamping in the globals and set it to a value like 5 or even less, if you use an HDR for the GI.

[timdog]

Or turn on "Affect Shadows" in the material

[irobert]

Thanks! Yeah the Supixel mapping helped a lot. It got rid of the super bright ones. However, I do have a lot of little red specks left. Will try out those techniques tonight. BTW anyone ever have trouble with the VFB not opening all the way? It opens, but then basically disappears and keeps rendering.

[vlado]

BTW anyone ever have trouble with the VFB not opening all the way? It opens, but then basically disappears and keeps rendering.

Which OS is this? On Mac OS X, it somes goes behind the main Maya window.

Best regards,
Vlado

[glorybound]

I had that problem a couple releases ago. When I had my material editor open the VFB wouldn't show.

[irobert]

Windows 7 x64 pro. Ill have to do a couple test. I *think* the VFB will be only a taskbar/minimized when the GI is turned on and if "Show samples/Show calc phase" is checked off.

Which OS is this? On Mac OS X, it somes goes behind the main Maya window.

Best regards,
Vlado