using a non-iso graphical overmap tileset with an iso main map misbehaves

[esotericist]

Describe the bug

using a non-isometric overmap tileset with an isometric main map results in attempting to render the overmap with an iso perspective. this is fairly non-productive.

Steps to reproduce

1. set main map to an isometric tileset (such as smashbutton iso)
2. set overmap to a non-isometric tileset (such as larwick)
3. open overmap
4. observe lack of usability

Expected behavior

i would expect a non-iso tileset to get rendered normally instead of as an isometric tileset

Screenshots

larwick, with incorrect isometric rendering

Versions and configuration

• OS: Linux
  • OS Version: Distributor ID: Debian; Description: Debian GNU/Linux 11 (bullseye); Release: 11; Codename: bullseye;
• Game Version: f85703b [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food]
  ]

Additional context

#58951 is also in play in the above screenshots.

i suspect that this issue might be related to #57123 given that there's clearly a state issue with regards to iso-ness of the currently loaded tileset(s).

[mlange-42]

The problem here is that there is only a global variable that says ISO yes or no. It is overwritten when loading the non-iso overmap.

Working on the fix currently...

[mlange-42]

Fixed by #60283. Can be closed.