Adjustment of already excisting 3D Modellling of Motorcycle Jet Helmet (Inner Linen texture & Details)

Dear Freelancer, we do have a lot of helmets for which we already have 3D illustrations. SOme of those need to get adjusted like the one attached (PDF) Find details below: 1. need to get converted to .obj - current file format = .stp 2. helmet need to be placed in a neutral position (currently placed on side) 3. File size need to get reduced as much as possible (6MB) 4. Need to illustrate some additional 3D elements (see PDF attached) - Inner Linen - Front Logo - Side Button - Side Tag (need to have his own level to make in visible and unvisible) - Visor (need to have his own level to make in visible and unvisible) ----------------------------------------------------------------------------------------------------------------------- All need to be finalized with textures so it looks 100% authentic at the end.