resolution in AE

Hello,

I have made a animation in AE with photograph in high resolution. If I use this photograph in a small size composition and I nest this compositon in a second High res composition the photograph resolution stays low. This whereas the used source material is of high quality. How is this? The eventual rendering nevertheless use of the imported source material?

Also if I want render stills (photoshop) from a PAL composition the resolution stays much lower than resolution from the used source material. This is an settings problem?


Wim