Master files problem  

@yeantbron Hi,

The first image shows a very strong gradient towards the horizon and possibly you can process that out by carefully applying Remove Light Pollution in tab 9. Increase the saturation of the image a lot and start putting a few small boxes along the edges of the image. Then click calculate and see what the result is. Slowly work your way to the bottom center, where the light pollution is largest.

How did you produce the image with the dark circle in the center and the bright edges?

Thank you Wouter, yes i have a very large amount of light pollution, 

the image with the bright edge is with dark/flat/bias/darflat, the other one is the integration without dof.

@yeantbron What happens when you integrate the lights without flats? Perhaps the flats are the cause of that.

@wvreeven it's in the process of integration, I would put the result when it is finished, I just put dark, bias and bpm.

well, the integration has crashed, back to the desktop, I've been trying for 3 days but each time with the dof it crashes. (only one succeeded but with only 20 images for the test of the post above, maybe my computer lacks power), I tried with 1.082 and 1.083beta1