blxbrx LEGO model of the day - Mona Lisa

There are a few ways of making LEGO pictures. 1) Studs Out is where the studs on top of each LEGO brick face up (placed base down on a LEGO baseboard), or 2) Studs Up, "where the bricks are stacked atop one another normally and the viewer is looking at the side of the bricks".
For finer colour detail in "Studs Up" you can use plates instead of the squarish "pixel" of the 1x1 brick side.
Have a look at this example from Eric Harshbarger. The picture is impressive for its detail, then you realise the size of it when you look at the second picture on the dining table. Detail at Eric's site at this link: Eric Harshbarger's Mona Lisa