Pictured here is the end result of this thought experiment. By way of a very roundabout process, which included conceiving an intricate 6-way panel connector that, sadly, is almost impossible, or at least too expensive, to manufacture (the subject-to-be of a later instructable), I settled on an assembly constructed from parts found in the hardware aisle at Home Depot.
Rather than focusing on the imagery alone and allowing the framing mechanism to disappear--or perhaps just play a minor supporting role (literally)--in this project I chose to celebrate the display architecture. Follow these steps to do the same...
Step 1: Ingredients
* 5 images of your choice printed on 8"-diag square glass (~5.6" per side) via fractureme.com (Note: Be sure to add the following in the comment field before completing checkout: "no mount please, but include white backing on all photos")
* 40 flat corner braces; 1-1/2"
* 24 corner braces; 1"
* 20 utility extension springs; 5/32 x 2-1/2 x .020
* 96 machine screws (round head combo); #6-32 x 3/4" (Note: You will only need 80 bolts, but you will need all 96 nuts.)
Step 2: Glass Corners
Step 3: Connecting Bottom Corners
Step 4: Connecting Top Corners
Step 5: Adding Feet
Connect the springs on the horizontal sides of the bottom of the cube only.
Step 6: Top Assembly
Carefully turn the top assembly and the base assembly upside down as shown. (Now you can see how the feet were assembled in the previous step.)
Back off the inner screws along the tops of the four base images (see the one closest to the top of the lighthouse) so the base will fit on the top. Carefully lift the base assembly onto the top assembly. Turn the screws that you previous backed off so that they extend through the corner braces that are waiting to receive them. Add the final 8 extra nuts to attach the top to the base.
Step 7: Completed Assembly
Step 8: Final Version
... with internal illumination! For the lighting, I used three battery-powered "under-cabinet" led lights. The lights are carefully positioned to avoid lighting hotspots; the one pointing upwards is rather low to allow the light to spread out and soften. The remaining two lights are aimed horizontally at the back of the cube; this allows the light to bounce off the white backing on the backward-facing prints, resulting in a soft and even glow on the forward-facing prints.