View source for Func reflective glass

[[File:Reflectiveglass0000.jpg|thumb|250px|func_reflective_glass (Note how NPC's and env effects are reflected)]]

{{base brush|func_reflective_glass}} 

==Entity description==
It is used to produce perfectly reflective glass that renders world + entities. You must use a [[LightmappedReflective]] texture (glass/reflectiveglass001.vmt is a good start) on one side of the brush, and the rest of the sides either [[Tool textures|nodraw]] or some other opaque texture for this to work properly.
It is functionally identical to [[Water|expensive water shaders]], but typically used with opaque, flat materials.

{{note|This entity will not show a player their own reflection in first person, but it will render all player models that are actually being drawn. Player is drawn in firstperson only in [[gmod]]}}
{{note|This entity may be constructed from more than one brush, but all [[LightmappedReflective]] faces must be on the same [[Wikipedia:Plane (geometry)|plane]] to work as intended.}}
{{Bug|This entity will always be drawn in front of translucent textures, including particles and sprites.}}
{{Bug|This entity will cease to render or cause visual artifacts if water and or [[func_areaportal]]s are in a visible visleaf (meaning they can see each other).}}
{{Bug|If more than one face of this brush entity contain a reflective or translucent texture, then the mirror's behavior will suddenly switch depending on one's perspective. To prevent this, make sure ''exactly one'' surface has the reflective texture. All others must be opaque.}}

{{Tip|To keep the [[Framerate]] high, use [[trigger]]s to disable the entity while not needed.}}

==Keyvalues==
{{KV|Solidity (Solidity)|choices|Used to control the solidity/collision of these brushes. {{bug| physics objects can behave oddly when placed directly on top of this brush, to prevent this make this brush never solid and add invisible or [[clip_brush]] floor on top.}}
:*0: Toggle - The solidity can be toggled together with its visibility.
:*1: Never Solid
:*2: Always Solid}}
{{KV|Solid BSP (solidbsp)|bool|Set this to BSP if the player seems to rotate oddly relative to the surface.
:*0: [[VPhysics]]
:*1: BSP ([[QPhysics]])}}
{{KV|NPC class excluded from collisions (excludednpc)|classname|If an NPC classname (i.e. {{ent|npc_zombie}}) is specified here, NPCs of that type won't collide with these brushes.}}
{{KV|Invert NPC class exclusion (invert_exclusion)|bool|If set, then the excluded NPC class will consider this brush solid, and all ''other'' NPC classes will consider it non-solid.}}
{{KV EnableDisable}}
:{{tip|If '''Solidity''' is ''Toggle'', disabling will also make the entity non-solid.}}
{{KV visiblebrush|l4d=1}}
{{KV BaseEntity|brush=1}}

==Flags==
*2: Ignore player +USE - Entity will ignore all {{ent|Use}} inputs, including ones from the player.

==Inputs==
{{IO|SetExcluded|Change the NPC class that does not collide with the brush.}}
{{IO|SetInvert|Whether to reverse the NPC class exclusion rule.}}
{{I EnableDisable}}
{{I visiblebrush|portal2=1}}
{{I BaseEntity}}

==Outputs==
{{O BaseEntity|l4d=1}}

== See also ==
*[[LightmappedReflective]], the material shader used for this entity.
* [http://www.youtube.com/watch?v=5NJMh5O-lIQ YouTube tutorial: How to make a mirror]