Thank you for your answer. I have no programming knowledge and think that by adding a few quarters, gaps etc here and there it could become very interesting (especially for fans of both games ^^). Some levels of Trasher, skate and destroy could be fun too, if it's not already done. I start Blender at once, it's not easy. If anyone can direct me to tutorials (preferably in french if I have permission to dream) I would be very grateful. I believe that Unity, 3Ds Max could also be useful for modeling / extraction.