1. A method of manufacturing a tangible substrate with a thermal film that is cut according to computer instructions, the method comprising: obtaining an input digital image of a design that is to be transferred to the tangible substrate and storing the input digital image in electronic digital memory of a computer; using the computer, rendering a plurality of design elements of the design as a single output image; using the computer and based upon the output image, a bleed size value, a maximum number of negative areas, a maximum number of positive areas, and one or more substrate attribute values: resizing the output image to include a border for bleed; filling all transparent areas of the output image with the one or more substrate attribute values; creating and storing a cutting path; creating and storing a mask image; digitally inverting the mask image in the memory; modifying the mask image to adjust one or more fill areas around one or more details, to limit negative areas to be less than the maximum number of negative areas, and to limit positive areas to be less than the maximum number of positive areas, resulting in a modified mask image; creating and storing cutting path data in the memory, comprising a vector path on an outline of the mask image; transmitting the cutting path data over a computer network.