Sunday challenge 62 = Square within a square - How to create a 3D white frame

Must be seen full screen on dark background
My design of a 3D frame, in four layers (bottom to top)
1. Dark gray outline 2650px
2. Smaller square with a cross to create shadow effect 2035px
3. The image within the frame 2000px
4. White frame on top. 2650px centre hole 2041px

You can see the final result full screen, where image 1234 is framed in a larger frame. Note that layer 1 is only visible as a thin line between layer 4 and layer 2. Save it as PSD, then you always can adjust color and tones according to your own taste.