Mirror problem

[Richard Budig]

There is nothing like having a mirror stationed about 7 to 10 feet behind your easel. Turn and look into it fairly often. You'll be seeing in reverse, of course, which almost instantly lets you spot a place where you may have gone wrong. It also automatically doubles the space from you to your painting. It it's (the mirror) is 7 feet behind you, your painting appears to be twice that distance when viewed in the mirror. You get a different look both ways -- in reverse, and in distance.

This method has been used for a very long time because it works.