using stellarium screenshots in planetarium shows

Tried out various options on the dome -

1. taking screenshots from within stellarium using the Ctrl-S shortcut key or using scripting
2. saving screen-grabs as movies using Fraps and Taksi

The difference in quality is glaring. The best quality is seen with the screenshots captured from withing Stellarium without warping. That is, when the Spheric mirror distortion option is chosen, the quality degrades.

So, I will have to go with first creating screenshots in fisheye mode, then cropping them and distorting them.