I do not remember ever seeing an option to render just a picture, only videos. I usually render in WMV format and lately I have been using MP4. I noticed over the years, more format options related to MP4 has popped out. Especially if it’s for a specific device, whether it be a PC, TV or smartphone, each MP4 format may be different sizes so it’s good to pay attention to the sizes like 1920×1080 would be for 1080p format too. I don’t know the few options from Sony Vegas 10 but I used Sony Vegas 8 and the format options were far smaller than there are now if I am not mistaken.