Export for Seperate I3D Folder with Shared Texture Folders

[ssnd292]

tldr:

Currently it is not possible to export i3ds into a seperate folder, where all use the same shared textures folder. This is often needed for placables or other generic models where several different meshes use the same textures (atlas textures, tilables eca)

If we would export with the current export model, it would create one textures folder in each i3d folder - which is a waste.