Picture
PNG, JPG or GIF, up to 12MB. Nothing is uploaded anywhere: the matching runs in your browser.
Size
...
Standing up as a wall, one block thick.
Blocks
One family reads as a deliberate build up close. Every block gets the closest colour from a distance and looks like noise next to it.
Floyd-Steinberg: the colour a block could not hit is pushed into its neighbours, which buys shades the palette does not have.
Materials
Take it into the game
A structure block places up to 48 blocks on a side, so anything wider than that wants the schematic or the function file.
Width is the only decision that really matters. It sets the block count, the build time and how much detail survives, and every one of those grows with the square of it: doubling 32 to 64 turns a 1,000 block afternoon into a 4,000 block weekend.
A face or a logo reads at about 32 blocks. Anything with small text in it needs 64 or more, because a letter has to be several blocks tall before it is a letter rather than a smudge. Past 128 you are building something that only reads properly from a long way off, and the schematic is the sane way to place it.
A standing wall is the usual answer and the one the plan is drawn for: rows from the bottom, one block thick. Flat lays the same picture on the ground, which is what you want for something read from the air, a floor pattern, or a build you will later cover with a glass roof. The block count is identical either way; only the plan and the commands change.
Pick an image, decide how wide it should be in blocks, and build it a row at a time from the bottom. Every pixel becomes one block, so a 64 wide picture is a 64 block wall. This tool does the colour matching and gives you the plan, with the row you are on picked out so you do not lose your place.
Map art matches the 61 colours a filled map can display and hangs flat in item frames. Pixel art matches the real colour of the block itself and stands up as a wall you walk past. Different palettes, different maths, different builds. Use the map art studio for the first one.
For photographs and anything with a gradient, yes. Dithering pushes the colour a block could not hit into its neighbours, which buys shades the palette does not physically have, at the cost of speckle up close. For logos, flags and flat cartoon art, turn it off: those are already made of solid colours and dithering only adds noise.
Width times height. A 64 wide image of a square picture is 4,096 blocks, which is 64 stacks. The material list on this page splits that by block so you know how much of each colour to gather, and the total is shown in stacks as well.
Only ones that hold a wall up. Anything that falls, like sand, gravel and concrete powder, is excluded, along with anything that is not a full cube. You can also restrict the whole build to one family, such as concrete or wool, which looks far more deliberate up close.
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