Pixel art is commonly divided in two subcategories: isometric and non-isometric. The isometric kind is drawn in a near-isometric dimetric projection. This is commonly seen in games to provide a three-dimensional view without using any real three-dimensional processing. Technically, an isometric angle would be of 30 degrees from the horizontal, but this is avoided since the pixels created by a line drawing algorithm would not follow a neat pattern. To fix this, lines with a 1:2 pixel ratio are picked, leading to an angle of about 26. 57 degrees (arctan 0. 5). One subcategory is planometric, which is done at a 1:1 angle, giving a more top-down look. Another subcategory is "rpg perspective", in which the x and z (vertical) axes are combined into a side/top view. This view is facing an edge, instead of a vertex.