First, sorry if this is double posted - I posted it previously, but then could not find my post anywhere. =(
The issue I'm having is that when I use a static background image in PI 3.0.1a, and I try to save the output as either a JPEG or PNG sequence, the image dimensions are terribly distorted. The resulting images are stretched along the height. I've tried setting the stage dimensions to match the image ... tried setting many many different size settings for the stage .. even tried removing the background image entirely and just rendering the emitters, but to no avail. The images just come out with the same problem. I've used different formats and sizes for the bg image, but no go.
Now, the weird part is that if I save the output as TGA or AVI, it looks perfect. No distortion at all.