WAL vs PCX: Quake II Mipmapped Texture vs ZSoft Paintbrush Raster
Compare id Software's Quake II WAL mipmapped texture format with ZSoft PCX: game engine mipmapping, colormaps, and raster performance.
Both WAL and PCX played pivotal roles in 1990s PC gaming. ZSoft PCX was the standard texture source format for Doom and Quake 1, while Quake II introduced WAL with pre-baked downsampled mipmaps and surface emission flags.
| FEATURE | WAL | PCX |
|---|---|---|
| Primary Application | Quake II 3D Mipmapped Surface Texture | 2D Bitmap & HUD Graphic Storage |
| Mipmaps Included | Yes (4 levels: 1:1, 1:2, 1:4, 1:8) | No (Single full resolution image) |
| Color System | 8-bit indexing Quake II colormap | 8-bit indexed or 24-bit RGB |
| Game Engine Metadata | Flags, contents, and light value | None (Standard raster) |
| Compression | Uncompressed raw mipmaps | Byte-oriented RLE |
- Contains 4 pre-calculated mipmap levels for instant GPU texture upload
- Embedded texture animation sequence pointers (animname)
- Includes surface light emission values and game content flags
- Eliminated mipmap generation lag in Quake II / id Tech 2 engine
- Universal 2D graphics format supported by Paintbrush, Photoshop, and GIMP
- Lossless run-length compression (RLE) saving disk space
- Used for menus, HUD graphics, and colormaps in classic games
- Independent of 3D game engine structures
PCX was the artist's canvas, while WAL was the 3D renderer's fast-path texture. convrtr converts vintage WAL textures and PCX bitmaps into modern transparent 32-bit RGBA PNG graphics.
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