This is a simple, multicolored tool to check wall thicknesses before you create new objects so you don't waste time on prototyping.

You can also check if the wall thickness on a print is like it should be.

You can change the colors by painting the file or if you don't have AMS just print one single color since the numbers are elevated.

You can also pause the print to change the colors manually, since the color change is after a certain layer height.