Trimmed image as Texture/Material

Hello, I am trying to work on numbering stained glass… I imported an image(which became surface in rhino) and started to trim each piece separately… The workflow works perfectly i can move/scale/rotate and each piece maintains the trimmed part of the image… I tried to use these pieces in grasshopper but when i reapply the texture on them the original Untrimmed image apply on the pieces… Is there any solution to save and reference the trimmed texture ?