The AH pdf manual mentions the ability to have the rectangle mirror internally rather the the round one by ommiting the texture graphic in the texture folder. Doesn’t say which graphic and specifically where. I found six files related to this. Trying switching or removing files gives varying results, but not the one I wanted. I reckon doing hundred of time consuming sim restarts is just too time consuming and frustrating. I’ve seen YouTube vids with this mirror. If anyone knows the solution, please share👍