The problem is Inventor doesn't export high quality TIFFs, JPGs, PNGs, or BMPs. The resolution is poor on all of them and there isn't a way to change that as far as I know because to generate these files, it simply takes a screenshot of the drawing. However, when inventor creates a PDF, you can choose the PDF quality and the product is can be very high resolution. If you have any other suggestions I would appreciate it. Thanks.