Custom materials not working

[Entih]

I am getting a similar but different issue. In a test using 4 formats: DDS, JPG, TGA, and PNG, only the TGA worked straight off. All four appeared in the editors, but in game a plane on which they were applied was fully transparent, except for the TGA image, and crashed the game when looked at in inspection mode (likely due to the texture reading feature not finding anything). I tried a few different DDS formats, but none worked before Photoshop started acting all bizarre and I gave up (Its likely one of the ARGB formats, but Photoshop crashed on exporting half of them).

If you're having trouble with materials yet, try TGA next. The filesize will likely be larger, but if it actually shows up properly in-game, then its worth it.