Do you have multisampling enabled maybe?

Yes, and to be more precise about the report I get a transparent image. OpenGL version 4.0

• Yes a couple of days ago it worked.
• I tested the default scene I get transparent image.
• Error message:

C:\b\slave_cmake_x64_vc12\win64_cmake_vc2013\blender.git\source\blender\gpu\intern\gpu_extensions.c(1595): ``Read Multi-Sample Pixels'' -> GL Error (0x0502 - GL_INVALID_OPERATION): Invalid Operation

• Turning off Multisample still fails.

• With Blender.exe -d I get a White frame and not a transparent frame

This must be caused by rB53d73c51a76577b8b9bb32fd08a967560353ab47

This code does check if multi-sample FBO's are supported, but there could be some missing check, or even a bug in the driver.

I've also tested this on an Intel HD Graphics 4600 on Linux, and it works properly.

Can you disable Anti-Aliasing from the render panel? This should work since it wont use the new code from the recent commit.

It works when disabling Anti-Aliasing

@Aaron Carlisle (Blendify), do you have a developer environment setup?

It would help if you could test this with this patch: P271

No I do not

Is Cuda required for compiling

No, you can disable every WITH_ option, except for WITH_PYTHON, for quick builds.

I don't think it is possible for me to set up a build environment ATM MSVC will take more time then I have

Im on osx 10.6.8 Ati HD 2400 Imac...
OpenGLl AntiAliasing doesn't work anymore!

I think I might be doing something wrong when I apply the patch:

C:\Users\Aaron\BlenderDev\blender>git apply C:\Users\Aaron\Desktop\MSAA.diff
C:\Users\Aaron\Desktop\MSAA.diff:10: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:17: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:19: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:22: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:30: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
fatal: corrupt patch at line 68

C:\Users\Aaron\BlenderDev\blender>

In T46496#342307, @Aaron Carlisle (Blendify) wrote:

I think I might be doing something wrong when I apply the patch:

C:\Users\Aaron\BlenderDev\blender>git apply C:\Users\Aaron\Desktop\MSAA.diff
C:\Users\Aaron\Desktop\MSAA.diff:10: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:17: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:19: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:22: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
C:\Users\Aaron\Desktop\MSAA.diff:30: trailing whitespace.
GPU_ASSERT_NO_GL_ERRORS("MSAA");
fatal: corrupt patch at line 68
C:\Users\Aaron\BlenderDev\blender>

http://wiki.blender.org/index.php/Dev:Doc/Tools/Patches

for git diffs

patch -p1 -R < some-new-feature.diff

Bug also confirmed in my system.
Windows 10 x64
Intel Baytrail

After applying the patch and recompile, OpenGL render with antialiasing is still not working.

@Oscar (KINjO), The patch is not intended to fix anything. It is to give the exact line that fails.

Could you paste in the text from Blenders console?
https://www.blender.org/manual/interface/window_system/console_window.html?#ms-windows

In T46496#342367, @Campbell Barton (campbellbarton) wrote:

@Oscar (KINjO), The patch is not intended to fix anything. It is to give the exact line that fails.
Could you paste in the text from Blenders console?
https://www.blender.org/manual/interface/window_system/console_window.html?#ms-windows

Oops sorry...

This is the output from the patched version:

C:\Users\oscar\Documents\Compile\Blender\blender\source\blender\gpu\intern\gpu_e
xtensions.c:1566: ``MSAA'' -> GL Error (0x0502 - GL_INVALID_OPERATION): Invalid
Operation
Evaluate all animation - 186.000000
        No Actions, so no animation needs to be evaluated...

And this output is from the buildbot version

C:\b\slave_cmake_x64_vc12\win64_cmake_vc2013\blender.git\source\blender\gpu\inte
rn\gpu_extensions.c:1595: ``Read Multi-Sample Pixels'' -> GL Error (0x0502 - GL_
INVALID_OPERATION): Invalid Operation
Evaluate all animation - 186.000000
        No Actions, so no animation needs to be evaluated...

@Oscar (KINjO),
Thanks for the feedback, the line that fails is:

glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_blit);

Added check for GLEW_EXT_framebuffer_blit, rB67e1c9735003bea56efb6ccfe7348dd7518ff25b

Please check if this resolves the issue.

@Campbell Barton (campbellbarton),

Tested with the latest buildbot (67e1c97) still not working, the render outputs a blank image.

This is the console output:

PS C:\Program Files\Blender> .\blender-app.exe -d --factory-startup

.\blender-app.exe : C:\b\slave_cmake_x64_vc12\win64_cmake_vc2013\blender.git\source\bl
ender\gpu\intern\gpu_extensions.c:1599: ``Read Multi-Sample Pixels'' -> GL Error 
(0x0502 - GL_INVALID_OPERATION): Invalid Operation
En línea: 1 Carácter: 1
+ .\blender-app.exe -d  --factory-startup
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (C:\b\slave_cmak...valid Operation:String 
   ) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
IDProperty group len: 128 0000000E8C181DF8
uiAfterFunc len: 256 0000000E8BDFAB68

@Oscar (KINjO), (and anyone else who can redo the failure).
Please attach system-info.txt - https://www.blender.org/manual/getting_started/help.html#system-info

Hi Campbell, my system-info is already posted here, tell me if you need anything else.

In T46496#342313, @Oscar (KINjO) wrote:

Bug also confirmed in my system.
Windows 10 x64
Intel Baytrail

system-info.txt9 KBDownload

After applying the patch and recompile, OpenGL render with antialiasing is still not working.

Here is mine