A great 3-D substrate - styrofoam. Here's how you do it. CLICK to watch:
Mosaic pot I made
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Hey, I found this really awesome Etsy listing at https://www.etsy.com/listing/262986132/handmade-ooak-mosaic-mandala-wall-art
How to Install a Mosaic on Mesh to a Wall - using mosaic mesh to create a mosaic makes creation easy, but what about installing it on a wall? This video shows how to do it and what you should be prepared to do...