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GBA/OpenGL: Sprites behind a Mode 4 background are hidden entirely #1907
Description
Activity
Do you have an example game this is used in? It's an easy fix but I want to make sure I do it properly.
Observed on Asterix & Obelix XXL:
Software renderer for comparison:
and Drome Racers:
Software renderer for comparison:
- added a commit that references this issue
on Oct 11, 2020 - added a commit that references this issue
on Sep 9, 2026
Any sprites with their priority set to draw behind a Mode 4 background will be hidden entirely - when populating the relevant background layer, the OpenGL renderer treats palette index 0 as a solid color rather than a transparent passthrough.
This might affect other background modes too; I'm not sure.
Observed on 7b3900f
Only occurs on the OpenGL Video Renderer. The Software Video Renderer is unaffected.