Ronald Hagenstein has created a free PSD file to LEGOlize your images. And the file is free! To use you download the PSD file, then open it in Photoshop. Drag your image into the file. make sure the new image is just above the layer titles REPLACE IMAGE. Then run a Mosaic filter on your image. Filter>Pixelate>Mosaic. He used Cell size 73 in his example.
That’s it. The LEGO logo and stud layers are already set. Download the file here.
Here’s a couple of mine. Jungle boy from a previous post. and The riddle from a Convention.