Black canvas overlay triggered within certain graphics applications

[cocobean]

The main canvas editing area of the graphics application shows a black overlay screen shortly after the canvas editing area appears. You can see the menus and panels or menus/panels may appear/disappear upon cursor movement over them. In Blender, the canvas area appears if trying to render an image and during the Blender splash screen when the app is launched - but disappears after you close the Blender splash screen image. In ArtPaint, the canvas area turns black but you can see the menu options and panels.

This issue is specific to Haiku x86_64 version for specific apps. Applications affected:

1. ArtPaint 2.1.2, 2.1.0git-7
2. Blender 2.79b

Seems to work: GrafX2, Becasso, TuxPaint