[Bug 48241] [SNB] rendering issues in minecraft GLSL mod.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=48241

--- Comment #3 from MWATTT <megwattt at gmail.com> ---
There are two compenents for the Minecraft's shader mod: the mod and
shaderpacks.
The mod is here:
http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1286604-shaders-mod-updated-by-karyonix

The last version supports Minecraft 1.8 (but not 1.8.1).

The mod can be installed by executing the .jar file. It will create a new
profile.

Most shaderpacks can be found on the first post from the link above. The most
used shaderpack is SEUS :
http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1280299-sonic-ethers-unbelievable-shaders-v10-1. 
Shaderpacks must be placed on /home/USER/.minecraft/shaderpacks (the folder is
automatically created when the mod is started). 

The main problem I've encountred with this one is a shader compilation failure
(affect all OpenSource drivers). The SEUS's shaderpack use texture2Dlod in
fragment shader without enabling any extensions, which AFAIK sould not be used
on GLSL 1.20. A workaround is to bump all affected shaders to 1.30. The driconf
option "force_glsl_extensions_warn" semms to be a simpler workaround.

There are also a lot framebuffer related problem on SandyBridge with some
shaderpacks, including SEUS, which doesn't happend on others drivers (r600g).
That lead to a black screen.

About apitrace, can I send a trace which is something like 200Mo?

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