August 14 fix roundup (2026-08-14) officially addressed this tiles issue: Tiles show unwanted stains. If it still occurs after updating, treat it as a possible regression or different cause, not a guaranteed repair of your existing save.
Match the symptom
Tiles show unwanted stains.
Check before changing your save
Compare the actual cleanup objective with the visible stain before assuming it is a required repair.
- Confirm Steam has completed all available updates.
- Compare the actual cleanup objective with the visible stain before assuming it is a required repair.
- Do not replace the complete tiled surface to test a visual defect.
Official fix versus your current save
The developer's August 14 fix roundup note establishes a historical fix for this symptom. It does not publish a universal recovery command or prove that a previously damaged save will repair itself. This guide has not independently retested your save.
Recovery decision
Do not replace the complete tiled surface to test a visual defect.
- If the installed game is older than the named patch, update and retest the same action.
- If the issue persists, try an existing known-good save without overwriting the failing one.
- If it repeats, report tiles, the exact objective, installed build and reproduction steps to the developer's Steam discussion board.
Your checklist
0 / 4Saved on this browser only. No Steam connection.
Sources & build scope
Full release · official patch notes; not a local gameplay retest. Source review is separate from a gameplay test.
- Gray2RGB: official announcements ↗Tier A · Launch through Update 6