Steps to solve a maze with Photoshop.

1) find a maze image that has good solid lines
(maze should have an open start and finish point)

2) use magic wand to select the border of the maze

3) in the menu do: select > modify > expand and enlarge by 3-4 pixels

4) make a new layer and then select a bright color(red works well)

5) fill the selection with that color

6) in the menu do: select > modify > contract and contract by 2-3 pixels

7) clear the selection and finally deselect

(Seen here)

	First, prep your shot as a square. For portraits, tight in is best. People will naturally view your mosaic from a distance or squinting to maximize contrast so details external to the person in the portrait will be lost (and a benefit-free pain in the ass to snap into the LEGO grid for you).
	In Photoshop, resize the image to 440 × 440 pixels and apply the Mosaic filter in Filter > Pixelate > Mosaic. Choose a cell size of 10. Then play with the brightness and contrast with an eye towards highlighting the most important details of the portrait.
	Change the photo to Indexed Color, select a Custom palette, and choose six shades of gray. The easiest way is to click on the grid and then when the color palette comes up choose Web colors only. Select white, black, and then a light, medium, and dark gray.
	In Preferences > Guides, Grids, & Slices set the Grid to a prominent color, gridline every 10 pixels, and subdivisions 1. Turn on a grid with View > Show > Grid.

In order to make the lego mosiac you’ll need one X-Large Gray Baseplate , one set of 2×4 Roof Tiles Steep Sloped Black, one set of Black Roof Tiles 25° (2×2, 2×4, Corner), and then as many 1×1 Studs in White, Light Grey, Medium Grey, Dark Grey, and Black as you need.

The end result?

Check out more great stuff from the original creator of this tutorial at Ascent Stage