My review of the Dallas exhibition On Screen/Off Screen: Kate Petley, Lorraine Tady, & Liz Trosper at Barry Whistler is currently up on Glasstire, a Texas-based art magazine.
I hope you'll give it a read. I posted some detail shots earlier, which I used as a reference when writing the review.
Below are some more. Kate Petley (the gray strip at the top is the wall behind the canvas):
Lorraine Tady (extreme close-up to show a line that may or may not be painted):