The nice thing about etching glass with a 75 Watt IR laser cutter is the precision and detail. I am able to get highly accurate images onto a round surface without much fuss. I highly recommend pulling your awesome Epilog laser cutter out of the closet and doing the same.
Step 1: Go get stuff
An awesome Epilog Laser Cutter
A rotary attachment
A container with water
Blue painters tape
A digital image of your face
Step 2: Attach the rotary attachment
Turn off the laser cutter. Align the pegs of the rotary attachment into the pegs in the bottom of the laser cutter. Plug in the ribbon cable into the socket on the side of the laser cutter.
Turn the laser cutter back on.
Step 3: Testing
Raster cut the tape with the following settings:
You can use the cut file attached below to get started. Keep in mind this file is of my face. You will need to make one of your face.
Figure out your measurements for your own cup and plan accordingly when making your image file.
Step 4: Make the file
Use the lasso tool to outline your face.
Once you close the outline, copy your face and paste it into a new document.
Now, apply the stamp filter to it such that it is a black outline with a white fill. You should now be all set.