Actually, you know what ? I'm done with the logical part :3 Right now it doesn't have any graphical interface but I can Dilate textures, make LODs and Pack / Unpack textures. I supports PNG and TGA. For technical reasons it'll be Windows only. Now... I have to make a UI... AAAAA-
Update on the texture tool : it'll be separated into smaller pieces, rather than a big software, because it's kinda hard to do the latter. Also, for technical reasons, I'll ditch Godot and rewrite it in C# instead.