BSP (Source)/Static prop flags

These flags are defined in public/gamebspfile.h. Any undefined flags are unused by the engine and can be used by custom VRAD compilers to define additional light baking parameters (in conjunction with a modified VBSP that can write those flags).

Flags

This is 8-bit (unsigned char) in all versions of the static prop lump except for , where it is 32-bit (signed int).

Bit	Name	Dev comment	Description
0x01	STATIC_PROP_FLAG_FADES	none	Set by engine at runtime if the model fades out at a distance.
0x02	STATIC_PROP_USE_LIGHTING_ORIGIN	none	Set by engine at runtime if the model's lighting origin is different from its position in the world.
0x04	STATIC_PROP_NO_DRAW (in all games since ) (removed since )	computed at run time based on dx level	Set by engine at runtime based upon mindxlevel and maxdxlevel. Does not work if set explicitly; set maxdxlevel to a low non-zero value such as 50 instead.
	STATIC_PROP_NO_FLASHLIGHT (in all games since )[confirm]	N/A (source code not public)	Set if disableflashlight is enabled.
0x08	STATIC_PROP_IGNORE_NORMALS (in all games since )	none	Set if ignorenormals is enabled.
0x10	STATIC_PROP_NO_SHADOW	none	Set if disableshadows is enabled.
0x20	STATIC_PROP_SCREEN_SPACE_FADE (removed since )	none	Set if screenspacefade is enabled.
	STATIC_PROP_MARKED_FOR_FAST_REFLECTION (in all games since )	N/A (source code not public)	Set if drawinfastreflection is enabled.
0x40	STATIC_PROP_NO_PER_VERTEX_LIGHTING (in all games since )	in vrad, compute lighting at lighting origin, not for each vertex	Set if disablevertexlighting is enabled. Contrary to the dev comment, this disables pre-baked lighting for the model altogether, making it lit the same way as CBaseAnimating props (ex: prop_dynamic).
0x80	STATIC_PROP_NO_SELF_SHADOWING (in all games since )	disable self shadowing in vrad	Set if disableselfshadowing is enabled.
0x100	STATIC_PROP_NO_PER_TEXEL_LIGHTING (only in )	whether we should do per-texel lightmaps in vrad.	Set if generatelightmaps is disabled. If VRAD is fed an older version of the static prop lump with 8-bit flags, this flag is treated as always being enabled (not generating lightmaps for any props). This flag is only read by VRAD; the engine will load the the PPL file associated with a given prop regardless of this flag, provided STATIC_PROP_NO_PER_VERTEX_LIGHTING is disabled and the checksum in the PPL file matches the checksum found in specified MDL.

FlagsEX

Counter-Strike: Global Offensive's static prop lump adds an extra 32-bit (signed int) set of flags, most of which are unused.

Bit	Name	Description
0x00000001	STATIC_PROP_FLAGS_EX_DISABLE_SHADOW_DEPTH	Set if disableshadowdepth is enabled.
0x00000002	STATIC_PROP_FLAGS_EX_DISABLE_CSM	Automatically set at runtime
0x00000004	STATIC_PROP_FLAGS_EX_ENABLE_LIGHT_BOUNCE	Set if enablelightbounce is enabled.