A very cool effect in our digital planetarium is to take slices of an image and use them to seemingly build or break apart the image.
In our Digistar system, I create an empty object to be the parent of all of the needed image planes and position the image planes accordingly.
By keeping the image slices organized in folders, the separate image planes can be assigned slidesets to advance or reverse through a set of images.
To make the image slices, I use GIMP.
There are lots of ways to place guides for cutting. I’m accustomed to a script that lets me put the guide positions in by percentage. I don’t speak German, but the script maker does. 
I check the boxes to indicate that I’m setting the guides by percentage, then I enter percentages and select horizontal or vertical.
My guides are in place.
Select Filters > Web > Slice
Because the slice tool is meant for web work, an html file is created. I just delete that later.
And then I have a folder full of sliced image pieces!