Hi Elang,
So with the different "types" of relief, you can go 2 routes. For "3d printing" i think you want to stick with "low relief" or bas relief.

For this you would use a program that can generate an "emboss" from a bitmap, 2d graphic. There are various methods. All the way down to just screenshoting your model. Poly modeling apps and cnc CAM apps usually have this ability

I think you can generate a somewhat "ok" model as a "high relief" inside of moi. But a high relief will not be great for 3d printing with regard to all the undercutting. If you wanted to take the time, you could probably "fix" the major undercut areas, for a 3d print.

To do a high relief in MoI, i would "rotate the model" to get the perspective you need in one of the flat views, then use the edit frame to flatten the model to the desired height.

I'll see about making a video to demonstrate the 2 options.