My question may look somewhat similar for the ones already answered on different forums "how to capture high resolution screenshots of blender"; although I don't care about the user interface at all!
What I want is only to create a screenshot of the 3D View itself with only a single object, that has a matcap shader turned on, with a custom resolution, eg. 4000px*4000px.
Is this possible? If not possible natively in blender, is there a non-photorealistic renderer that uses only a reflection map (matcap) to produce an image in custom resolution? (atm I could not find one)
NOTE: If a Python script is available for saving partial screenshots at a given zoom-level, one-after-another it also works, I guess. (at least when I want to capture the model in ortho projection).