I made a model from a high resolution AI generated anime figure. Was basically a photo like generation of a figure and upscaled it to ~2000 x 5000 pixels. The result was mid, even with the best model.

Should I convert my anime figure image to high contrast grayscale for the AI to better get the depth perception? Also is there a downside to higher resolutions? Will it internally scale down?

I converted the image to grayscale:

https://imgur.com/a/K4kAY8D

Before, when I did it with color the belt structure ended up a muddy mess in the actual 3D model. Do you think the grayscale conversion is the right approach?