My problem is a bit complex, so this I'm going to break it into some topics:
My project: The project consists in a static background overlayed by some imagery elements and a gif (the blue/purple circle is a gif).
The problem: However, I'm having problems editing the overlaying images (the girl's render, for example). Whenever I try to edit any element aside from the gif - adding a shadow to the render on f(x) for instance, which is my current issue - only one frame is modified, and the other frames remain the same.
What I've tried so far: The obvious solution I thought of was selecting all the frames at once, holding shift. However, that only solved my problem partially. (when I tried to paste new elements to the composition and move them around).
The other solution I came up with, based on my previous experience, was to copy the whole static elements and paste them into a new project, editing what I wanted to edit onto the new tab and pasting the whole thing into the gif project again. Everything worked fine up until now. Then I decided to add some shadow to the render image. Things went downhill again.
With shift pressed, I selected all frames and clicked on the render to add a shadow. However, the only frame that was modified was the one that was visible. I then decided to add shaddow to the single image manually. Started from frame 2 to 15. When I clicked on frame 1, everything reseted. After I added the shadow to frame 1, I clicked on frame 2 anda the f(x) shadow was gone! Same thing to the remaining 13 frames!
I copied all the background and pasted on a new layer without the shadow thing and added the shadow there. Pasted back and, surprise: same issue. Only the the visible frame had the shadow (even though I had selected everything at once).
Combining all the gif layers into a smart object didn't work either...
The strange fact is that the render's white outline (check the screenshot), which is also a f(x) feature, worked just fine! (with the copy-and-paste-into-a new-project solution)
Am I missing something or is my photoshop bugging?
Thanks in advance