Maybe we have a Misunderstanding here. I don't use 3 Monitors, just one and so i can not really judge it, but normally it shouldn't be different to set up the Mirror Positions, by moving them. On the Screenshot from your left Mirror, you can see the vertical Line that "separates" the View and that is caused by the Fact that, if you move the Mirror too much to the Side, it starts using the other Side of the Mirror Texture, which leads to the shown Effect. So what i don't understand now is, why you can not stay into the usable Range of the Texture, to get the left Rearview Side being displayed in the left Mirror and the right Side into the right Mirror? And it's the same with the Height. What kind of rear View do you want to get?
Okay, I see what you mean. I might just be bad at setting mirrors, but I couldn't find a range where the correct mirror is displayed (and not part of the other with a separation) and I can see correctly the side. But I might as I said Juste be bad at that. I wasn't aware of the fact that if you go too far on a mirror, it starts using the other one. But honestly, I thought I had tried everything, I really tried to fine tune, using the controls but also the mirrors size. But I might have done that wrong. As I said, I'll give it another try tonight after work (French guy here). Thanks a lot.
If you would record a Video, from when you try to set the left or right Mirror, it maybe could show where the Problem is.
I only tried with this one as I'm really beginning with RF2, and I have to train with this specific car for a championship.