#194 pymol 1.9.0.0 produces checkerboard in ray-tracing demo in HD 2600 XT
The pymol 1.9.0.0 sources built under fink produce a new artifact in the ray tracing demo. When the ray tracing demo is selected, it is drawn with a checkerboard gray and black background as shown in the attached screen shot. Oddly, clicking on the rendering window causes the demo to be redrawn and the gray/black checkerboard background is then replaced with the expected black background. So the issue seems specific to the initial rendering of the ray trace demo.
Detected OpenGL version 2.0 or greater. Shaders available.
Detected GLSL version 1.20.
OpenGL graphics engine:
GL_VENDOR: ATI Technologies Inc.
GL_RENDERER: ATI Radeon HD 2600 OpenGL Engine
GL_VERSION: 2.1 ATI-10.4.12
Adjusting settings to improve performance for ATI cards.
Detected 8 CPU cores. Enabled multithreaded rendering.
Setting: ray_shadow set to on.
Setting: light_count set to 2.
Setting: light set to [ -0.40000, -0.40000, -1.00000 ].
Setting: ambient set to 0.05000.
Setting: direct set to 0.20000.
Setting: reflect set to 0.85000.
This is for a build using
r4179 | speleo3 | 2017-10-18 13:27:42 -0400 (Wed, 18 Oct 2017) | 2 lines
(svn propdel svn:executable)
This is a feature, not a bug, and it's controlled with the opaque_background setting. We've changed the default value of this setting in PyMOL 1.9.
Run this in PyMOL 1.8 (or any older version) and you'll get the same result:
Doesn't this imply that the ray-trace demo needs to be tweaked to provide a more uniform experience? Having a demo which displays a checker board background when run but a black one when clicked on, seems a bit random in behavior.
when you click on the image, you're discarding it and PyMOL switches back to real-time rendering. That also was the same in previous versions.