Shortly after zooming out to max zoom:glxinfo wrote: OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
OpenGL core profile version string: 4.2 (Core Profile) Mesa 18.0.5
After walking in circles a little bit:
Walking in one direction for a while produces fine lines in the direction of movement. Zooming in/out corrects back to correct colors, but walking around restarts the artifacting anew. Full color depth fixes the issue, at a performance cost obviously.