Procedural animated texture generation/Fire
This page describes content that has been removed and was only present in earlier versions of Minecraft.
Procedurally generated textures such as this one were removed and replaced by pre-rendered animations in Java Edition 1.5, Pocket Edition v0.14.2 alpha, and Xbox 360 Edition TU12.
Detailed information is limited, however an implementation has been made in MC-TextureGen: https://github.com/NeRdTheNed/MC-TextureGen/blob/main/mc-texture-gen-impl/src/main/java/com/github/nerdthened/mctexturegen/generators/FireGenerator.java
The generated texture is 16x20; the bottom 4 pixels are cropped, leaving a 16x16 texture.