Hi David,
Thanks for the reply. I set up a test and created one rectangle using SCISSOR and CLEAR and compared it to a rectangle using BEGIN(RECTS) with a line width of 16 * 1. I see a little bleed into the surrounding pixels when I use BEGIN(RECTS). It's subtle, but the edges definitely aren't as crisp as when I use SCISSOR.
So I guess, if I want the sharpest possible rectangles (and I don't know if that is truly necessary), I need to use SCISSOR.
I should note that the output from my BT817 goes through a chip that converts the signal to HDMI where it is displayed on a small monitor. I'm not using the monitor's native resolution, either. I'm displaying at 480p and the monitor is native 720p. That said, I can always identify which rectangle was made with SCISSOR and which was made with BEGIN(RECTS), even when I swap their screen locations.
mike