On macOS 11.1 with latest master build, .png files with LCT_RGB type never get displayed (or used, seemingly) when loading them as spritesheets. Only LCT_RGBA is accepted. Maybe this is an issue caused with how I'm exporting the .png?
Yep, I can confirm this is an issue, I'll fix it, but I would suggest you use either paletted spritesheets or RGBA spritesheets for since color 0 is transparent.
On macOS 11.1 with latest master build, .png files with LCT_RGB type never get displayed (or used, seemingly) when loading them as spritesheets. Only LCT_RGBA is accepted. Maybe this is an issue caused with how I'm exporting the .png?
LCT_RGB ignored:
LCT_RGBA accepted: