When I trace something I normally printout the picture and put it on top of a light box then tape it to the corners so it's secured in place. After I have done that I place a blank piece of paper above it and start tracing. Use pencil first though!
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don't know you didn't put any answers down bro
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you need to put the full question or peeps can't answer
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An optical illusion is an art that feels alive but is not. I would make an optical illusion of a bunch of waves then shade perfectly so it looks like flowing water.
HOPE THIS HELPS