I have used many versions of Photoshop in the past for some time for focus stacking. It's usually pretty easy. I shoot my stack, import to Lightroom, usually correct one image in LR, copy the settings to the other images, select them all and use "edit in" to "open as layers in Photoshop."
I then select all the layers, and "auto align" them. I then select all the layers and "auto blend" them. I usually then have a bunch of layers with variable layer masks which I either try to retouch or just flatten. My computer is a new Mac Pro with plenty of SSD space and RAM.
I did this yesterday with 24 images of a dahlia. They were shot with a D800E, 85mm PCE lens, on a sturdy Gitzo 3 series tripod with an Arca B1 head and RRS rail. I used Photoshop CC 2014.
I ended up with all blank black layer masks except for the bottom one, which was white. The image was clearly NOT focus stacked when I flattened it. It had huge out of focus areas.
I took the same images and did the same thing on my Macbook Pro laptop and got the same result using Photoshop CC 2014
I downloaded a trial of Helicon Focus and tried using it on the Mac Pro and the result looked great. I'm happy to invest in software that works but I do pay US$9.99/month for Creative Cloud and feel it should do what it says it will do and what it has done before.
I then did the same thing with Photoshop CS6 on the new Mac Pro and VOILA it worked like it used to.
Has anyone else tried this and had similar problems with CC 2014? It sounds like a bug, a serious bug for me, with CC 2014.
Thanks for any thoughts.
Eric