Prerequisite: You must use an image sequence; eg. all files are named: image_04.jpg
material SOP and input a principle shader to target object
Activate Local override
Use either of these expressions:
// Use all of your sequence frames:$HIP/tex/`image_@primnum%90`.jpg// Randomize$HIP/tex/`image_floor(fit01(rand(@primnum),0,90))`.png
90 is an arbituary value ; you can use your total image sequence frames
the backtick ` allows use to add an expression into the string
This technique is similar to copyStamp; we are referencing primnumber and adding an different image for each.