itch.io

With blender and the plugin it works all fine. Even if you dont know blender its easy. Import your model, press TAB (to get into edit mode), press F3 and search for "triangulate mesh". After this, just press TAB again to get into object mode and export the model.

you have to put your uv.png inside the models folder of your project with the same name of the entity inside the game

example:

entity name --> house

in the model folder it appears as house.md3

you have  to name your uv as house.png and put inside the model folder