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One thing though about version 1.3 is that it handles the geometry of animated parts OK - when I output from the most recent (Feb 8, 2018) development release to AC3D (AC) format, the geometry is mangled there as well as the TGI.
It would be nice to have an AFS2 option in the Texture output part of the Material Editor that would do the image flip and the conversion to 24 bit BMP. Objects with transparency like a propeller or a tree might have to be handled by the user with DXTBMP or GIMP.
It would also be nice to have an option when I output to AC3D to have it use BMP instead of DDS for the textures.