Graphical overmap is incompatible with the Debug Night Vision mutation

[NetSysFire]

Describe the bug

Everything renders as black in unexplored areas.

Steps to reproduce

1. Enable a graphical overmap tileset. I used RetroDays.
2. Check the map with debug night vision.
3. Everything which is unexplored is black.

Expected behavior

It should show me the entire map. Without the graphical overmap being enabled, it looks like expected with the debug mutation.

It even says "forest" in the top right but the correct tile is not being shown.
Manually revealing the map works and shows everything like expected.

Screenshots

No response

Versions and configuration

• OS: Linux
  • OS Version: LSB Version: n/a; Distributor ID: Arch; Description: Arch Linux; Release: rolling; Codename: n/a;
• Game Version: 0.F-9426-gcb051eb5bae [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  No Fungal Growth [no_fungal_growth],
  Bionic Professions [package_bionic_professions]
  ]

Additional context

No response

[NetSysFire]

I just reproduced this again on both 0.H rc (not a blocker, this is debug only) and experimental.