[E_ri_k (Erik)]

Hi guys, I'm having a problem calibrating images in PixInsight (Its been a while!). I have acquired 100 bias frames and 50 dark frames, and created masters of both following the PI tutorial.

When calibrated I end up with an image which looks badly clipped?? (see screenshot)

I noticed if I calibrate using ONLY using the bias, or ONLY the dark, the image looks fine, but when I use BOTH bias and dark I get the strange output?

Same result if I don't use the masters, and use the single bias and dark?

Any ideas?

Erik