Graphic/3D Designer to create Product Mockup Proofs w/ Background - We have 3D model

We sell custom branded products and clients submit their artwork to us. We current use 3DS Max to render proofs of our products to send to clients. We want proofs that are simple, clean yet powerful. We need a mockup/proof that we can use that shows a realistic looking product where the client can see at least the front + side angle and a back + side angle. Really looking for an initial mockup where we can render or photoshop each client's artwork on easily and have the ability to simply swap out the background with pre-designed images. We have attached photos of another company's proofs that we like (file names start with pt-comp-#.jpg). The 3DS Max file is out current proof layout, the EPS is the actual template and artwork a client provides, there are 2 JPG artboards exported from the EPS to be imported into 3DS Max for the rendering and then we save it as a JPG proof for the client. We need: •3DS proof to be angled different/look more realistic or more thought put into it, while client still is able to see the majority of the front and back of the product. • Product to be rendered with client artwork that we can swap out easily. • Proof to be put on a nice background. Can use colors, background images, but must be a realistic or simple/clean look. Feel free to use gradients. • Would like to eventually be able to swap out the background with different pre-made designs that look like they go with the product.