Hello!
Did a check on Unity & Blender, I've also checked for the inverted normals but everything was alright for me.
Make sure to set the blending mode to opaque if available and turn off backface culling.
I'm not really sure why there are missing faces on Godot, I have never used it.
If the issue still persists I can issue a refund.
Yep, issue persist with Godot. Im actually considering switching to Unity. And about a refund... are you joking?? No need for refund, man you spent a lot of time working on those assets and I literally spent just couple euros buying them. Your work already is very devaluated by the market saturation. So please, no refund needed. If I will need some small edits I will learn how to do it myself.
