func_friction
... 
func_friction is a brush entity available in all 
GoldSrc games. It allows you to create an area of low friction, to simulate an icy area, for example.
Key Values
- Render FX
(renderfx)<choices> - Render FX mode to use, for special effects.
Value Description 0 Normal 1 Slow Pulse 2 Fast Pulse 3 Slow Wide Pulse 4 Fast Wide Pulse 5 Slow Fade Away 6 Fast Fade Away 7 Slow Become Solid 8 Fast Become Solid 9 Slow Strobe 10 Fast Strobe 11 Faster Strobe 12 Slow Flicker 13 Fast Flicker 14 Constant Glow 15 Distort 16 Hologram (Distort + fade)
- Render Mode
(rendermode)<choices> - Render Mode to use.
Value Description 0 Normal 1 Color 2 Texture 3 Glow 4 Solid 5 Additive
- FX Amount (1-255)
(renderamt)<integer> - Controls transparency when using another render mode then normal. 0 is completely invisible, and 255 is opaque.
- FX Color (R G B)
(rendercolor)<color255> - Color to use by the specified render mode.
Also used to control the speed of scrolling textures; seefunc_conveyorfor more information.
ZHLT:
- ZHLT Lightflags
(???)<choices> - Special lighting behavior. Only available if using Zoner's Half-Life Compile Tools.
- 0 : "Default"
- 1 : "Embedded Fix"
- 2 : "Opaque (blocks light)"
- 3 : "Opaque + Embedded fix"
- 6 : "Opaque + Concave Fix"
- Light Origin Target
(???)<string> - Used to define a target to sample lighting from.
- Percentage of standard
(modifier)<string> - Percentage of friction between 0 and 100.
Flags
- [
2048] : Not In Deathmatch
