Can I apply for a patent without a physical painting?

You don't need physical objects to apply for a patent, so you don't need to make things artificially to apply for a patent.

When applying for a patent, you must provide specific technical plans and drawings. The circuit should have a circuit diagram or schematic diagram, and the mechanical structure diagram should be available.

Draw the drawings and write down the technical scheme, and then you can find a patent agency or a professional to help you apply for a patent.