Hey, it's possible to import something in grandma3 3d ? Sketchup, gm2 3d saves, etc .... ?
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If you own Sketchup it can output 3DS files. Also Blender 2.79 can output 3DS files. Unfortunately 3DS export in Blender 2.8x has been removed but you can build in 3.8x and open in 2.79 to export 3DS files.
Not sure about GMA2 3D.
have an idea for the 3ds import method on grandma3 soft ?
Did you take a look at the thread I linked to in my previous message. it's detailed in there.