Using Lightroom + Photoshop for focus stacking
I have a 42MP Sony A7R3 camera, and I used compressed RAW, which results in ARW files of around 42MB.
Say I have 2 of these files, and I open them as layers in Photoshop, focus stack them, and then flatten them to remove all layers. The resulting image contains the same number of pixels as each individual image that I started off with.
Now, I am trying to save this, to continue editing in Lightroom, but no matter what format I use i.e. PNG or TIFF, the resulting file becomes over 200MB and I don't have that kind of space! How can I get the focus stacked image back to a reasonable file size of 42MB that I started out with?