Re: [Mesa3d-users] rendering artifacts mesa vs hardware

[burlen <bur...@gm...>]

Thanks for your help,
It didn't make a difference, but I agree it looks like depth buffer issue.

Another issue I am seeing in the mesa rendering has to do with 
inconsistent choice of which tubes are on top. This occurs in parallel 
rendering only so I didn't mention it before. You can see the 
inconsistency by comparing the hardware/nvidia and mesa in these images:

http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts-decomp.png
http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts-decomp.png

Jeff Lee wrote:
> looks like a depth buffering issue - what happens when you setenv 
> MESA_GLX_DEPTH_BITS 24?
>
> On Fri, Jan 15, 2010 at 12:22 PM, burlen <bur...@gm... 
> <mailto:bur...@gm...>> wrote:
>
>     I would like to report an issues I see when I replace hardware
>     rendering
>     in my app with mesa. I am new to mesa so I am not sure where the bug
>     lies, in the app or mesa. So I suspect it may be in mesa because
>     hardware rendering works fine , I have doubts because I don't know if
>     the app does anything special when it uses mesa. I hope some one here
>     can say for sure weather or not it's a mesa issue.
>
>     The issue is strong artifacts appear on the surface of rendering
>     tubes.
>     zooming in makes the artifacts recede to the edges of the tubes but
>     never completely go away. Here is an illustration of the artifacts
>     and a
>     hardware rendering that doesn't have the artifacts.
>
>     http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/mesa-artifacts.png
>     http://nashi-submaster.ucsd.edu/movies/PV/tube-filter-artifact/nvidia-no-artifacts.png
>
>     By the way, I reproduced on two machines with intel and gcc
>     compiler and
>     two mesa version 7.5.1 and 7.7.
>
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