Change the file extension to mt5 and place in a materials folder.

I apologize if you don’t have the P5 flag, I know it’s a terrible choice, but something that I believe most of us have, it’s also easy to get an alpha from.

Replace the flag with your original image and the step with an appropriate mask (which may need to be connected like the flag). You can replace the simple color with your own skin texture.

The equations are derived from the formula at the attached link.

I added some nodes to make the left tat easier to position.

The nodes labeled centers are for centering the rotation around the center of the image.

The node M 26 is the horizontal center of the uv map. I think it’s close to .393 or .394 for V3.

Good luck with this, it is a daunting task. I hope this tool helps.

Gary.