Editing Image Formats (section)

== Flat ==
''Flats'' are textures used for floors and ceilings. The file format is a simple dump of palette indices. Doom originally required these to be 64x64 pixels in size, but Weissblatt supports any square size between 1x1 and 2048x2048.

=== Fade ===
The screen fade format is identical to flats; a simple dump of palette indices. Sizes are required to be one of the following:
{| class="wikitable"
!Image Size
|-
|80x50
|-
|160x100
|-
|320x200
|-
|640x400
|}
When rendered in-game, only the red channel is considered when dereferencing colors, with the value of the red channel serving as transparency or ''alpha channel'' for rendering the screen transition. For convenience, most artists prefer to draw screen fades as paletted grayscale images.

When importing screen fades into your [[PK3]], it must be rendered into individual frames matching the file names <code>FADExxyy</code>, with <code>xx</code> standing for the screen fade number and <code>yy</code> standing for the frame number. All frames must then be placed <u>in a contiguous, numerically ordered list</u> under <code>Fades/</code>. Not maintaining continuity and/or numerical order will result in errors.