Probably they didn't appear before because of differences in the way one version (or rather, implementation) of OpenGL is clipping the polygons vs the other version.Īdd asserts to make sure your counts and offsets are within bounds on calls to DrawArrays/DrawElements. Maybe there are NaN or very large values in the W components of the points after projection. How should I go about debugging these sorts of issues, and what are the likely causes that manifest as artifacts? (The hexes and the white-ish path are what I inteded to draw, only the black/yellow/blue triangles are the artifacts) Given that this only appears in 4.4 and not in 4.5, my guess would be that I have some undefined behavior that manifests only in one version? I'm not using any advanced OpenGL, just drawing basic triangles with VBO buffers. They move around somewhat randomly and are always pointed towards.

When switching version of OpenGL from 4.5 to 4.4, I suddenly started seeing these weird random triangles flickering over my scene

Opengl 4.4 gdebugger not showing