Custom types for user defined UDMF fields could cause problems when fields with the same name used different types, so they are disabled for the time being (only bool, int, float and string are allowed now)

Update things before adding their geometry in visual mode so things don't go awry when realtime editing them. Fixes #393.

Aligning textures on the X axis now works correctly with negative scale values when world panning is not enabled.

There can be multiple different ambient sounds with the same sound name, so add the index to the name to differentiate them. Fixes #390.

Copy resource bitmaps before using them on a worker thread

Print a warning and skip parsing classes that try to inherit from themselves (instead of going into an infinite loop)

Fix inconsistencies between the "file specification" (as documented on zee internetz) and what devteam.pcx from Descent actually contained (the only pcx I have)

Add texture format to the Texture class so that render target textures do not have to be in the bgra8 format

Remove IImageLoader code duplication

Fixed: there was no highlight shader for internal sprites for ZDoom effects disabled;  Fixed: highlighting of transparent walls/floors was broken

Load previews when they are accessed

Dispose the bitmap as soon as it has been uploaded to a texture. Use a 1 bit alphatest bitmap for those that have transparency in them.

Fixed an issue where grid background images were drawn upside down and moved in the wrong direction on the Y axis when scrolling

Disable devil
Support mac build (which is useless as mono doesn't support winforms on modern macOS)