Okay, I think I figured out my own issue. I was outputting to PNG, and for some reason, when you save the image to PNG, you get a transparent background. I solved that problem by saving to JPG. Now it saves the render correctly. Thanks nruddock for responding! BTW: To answer my own question about waiting to run SaveImage, I am using scene.ProcessSomeEvents(1) right after the Render() call to allow the render to complete. Don't know if it matters, but it works fine this way so...