CompuServe Messages

As others have said, Bryce, you've got the formula correct, and by using it you should be OK. It would seem some of the dicrepancies stem from simple mistakes to small changes in the frame buffers' resolutions (say, from 480 to 486) over the years. I'm not really sure. Re your question about rendering to NULL, remember that this setting exists to match your rendering to the _frame buffer's_ pixel aspect ratio. In other words, if your frame buffer or display device displays a non-square pixel, then you need to render the image accordingly. When you render to NULL, you'll get a file on disk–What are you gonna display it on? If it's for print, or a square-pixel device, then set an image size and a 1.0 pixel aspect ratio. If it's for a display device that has a non-square pixel, use your formula and you're all set.