If you need photorealistic renders, I can create images that can serve you for marketing purposes. I do not charge rendering time, just the time required to set the scene set (adjust the camera view, textures, lights, enviroment, etc), unless the required rendering time is more than 4 hours, in which case my rate for rendering time only is $5 per hour. I can work very fast, so if you provide me the CAD or 3d model, I can create several good quality render images for you, with different light/camera/background configurations, so you can choose the ones you like most, and then I can improve them to the best quality whithin a a couple days. I can create custom lights, enviroments and textures, depending on the requirements of the images, and also modify the original CAD file for better render quality (e.g. adding features or geometries needed). Moreover, I can generate basic animations, such as turntables or exploded views. I like to keep in touch via skype or whatsapp, and send daily updates to receive feedback before setting the final render image.