CGTalk - Lines on Render issue.

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whookam

02-03-2005, 03:54 PM

Hello all.

I am in the middle of a project doing some shader tests. I am not a 3D person by nature (more of a retoucher) so could do with some help sorting this issue from those who know about these things.

I am getting lines on my renders that seem to corrolate to the 'blocks' that are displayed as Mental Ray renders the image. On the first image you can see what I mean. I've highlighted the lines on the second image.

This also happens when batch rendered.

Using Maya 6.01 on Mac OSX on Dual 2.5G5. Caustics on, GI & FG off. Settings as below.

http://www.fictionimaging.pwp.blueyonder.co.uk/cg/test1.jpg
http://www.fictionimaging.pwp.blueyonder.co.uk/cg/test2.jpg
http://www.fictionimaging.pwp.blueyonder.co.uk/cg/settings.gif

floze

02-03-2005, 04:55 PM

Probably a parallelism (multithreading) issue. The dielectric specially has problems with it. This is a general bug (more or less) and has nothing to do with the render globals.
Try using the L-glass shader instead:
http://home.broadpark.no/~rslettli/lob_glass.html

whookam

02-03-2005, 06:34 PM

Thanks for the reply although I am not using a Dielectric material its just standard Phong. I thought the multi-thread issue caused graniness in the render.

Anyway a fresh reboot seems to have helped a little.

Cheers,

Steve

Jackdeth

02-03-2005, 06:47 PM

Make sure you have good UVs. Sometimes MR will randomly dis-color the render tiles if the UVs aren't there on the object.

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