SPR

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.SPR is a file format used to store 2D sprites in GoldSrc. It is a modified version of the SPR format used by Quake, adding a dedicated color palette and additional translucency formats.

Image format types

Format	Explanation
Normal	Opaque image with no transparency
Additive	Additive translucency; dark areas are more translucent than light areas
IndexAlpha	Single-color with 8-bit translucency
AlphaTest	Binary alpha-tested transparency; pixels using the last color in the palette will be transparent

Orientation types

Orientation	Explaination
Parallel	Rotates to always face the camera
Parallel Upright	Like parallel, but doesn't rotate around Z axis
Oriented	Rotated in map editor to face a specific direction
Parallel Oriented	Combination of parallel and oriented.
Facing Upright	Like parallel upright, but rotated based on player origin, rather than camera.

External links

• GoldSrc Sprite Tutorial by The303