Astrophotography LRGB stacking

[Dan_Valentin]

Affinity photo keeps crashing when I try to stack luminance, red, green and blue FITS files. I can stack only three of these types (Luminance, red and green), but when I try to create a new astrophotography stack for the forth one (blue), it opens a black window which freezes my screen. The order doesn't matter, always the last one crashes the software. I do mention that I have a paid license. is there any size limit on the fits files, or what can possibly go wrong ?

My PC : Asus ROG I7 1070H CPU, NVIDIA GeForce GTX 1650 Ti

[NathanC]

Hi @Dan_Valentin welcome to the forums,

Is this freeze only occurring when you are attempting to add the FITS files to your final stack or when you go into File > New Astrophotography stack?

In case this is Hardware usage related, have you tried saving and closing your previously stacked files, restarting Photo and then trying the stack again to see if it freezes?

[Dan_Valentin]

Thsnks, I tried saving them each time I stack and it worked. The freeze occured when I was clicking new astrophotograpy stack.