View source for Alien Swarm Deferred

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{{hierarchy|as}}

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| file = Deferredas bg.png
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{{asd|4}} was released in 2012. It's a third-party mod created by ''Kristjan Skutta a.k.a. Biohazard90''. This fork of {{as|4}} has support for [[deferred lighting]] and shadows (similar to {{Xe|4}}). It's among very few {{source|4}} games that have dynamic shadows not based on projected textures, while still having its source code available to the public. Performance-wise, it is extremely impressive as the mod can support hundreds of dynamic shadows with very little performance impact.
{{important|{{asd|1}}'s lighting implementation and {{xe|3.1}}'s are completely different, for example [[anti_aliasing|MSAA]] is not supported in '''Black Mesa''' while in '''Alien Swarm Deferred''' it is!, however it is highly recommended that user uses post-processing alternatives such as [[anti_aliasing|FXAA]] instead as deferred lighting/shading in general works better with post-processing anti-aliasing methods.}}
{{warning
|Alien swarm deferred's lighting implementation will disable all baked lighting and the world will only receive realtime lighting and shadows! {{note|In {{lw|4}} it was changed so that deferred lighting blends with lightmaps instead of disabling them.}}}}
==Features==
New since {{as|4}}:
; [[CSM]]
: Real time '''deferred''' shadows and lighting from {{ent|light_deferred}} and {{ent|light_deferred_global}} entities.
; Light cookies
: Now {{ent|light_deferred}} is capable of projecting textures with cookies.
; {{wiki|Blinn–Phong reflection model}}
: New reflections on [[Phong]] materials, somewhat similar to [[$specmap_texture|specular]] from {{Xe|4}}.
; [[Volumetric lighting]]
: {{ent|Light_deferred}} is capable of enabling volumetrics that react to the environment in real time.
; [[Source shader editor]]
: Make and edit shader graphs in real-time, in-engine.
; [[Light editor]]
: Edit your map's light entities dynamically.

==Media==
<div style=width:100%;overflow:auto>
{| border="0" cellpadding="4" align="center"
|[[File:Deferred phong ref.png|thumb|500px|Phong reflections]]
|[[File:Deferred volumetrics.png|thumb|500px|right|Volumetric lights and god rays]]
|[[File:Deferred csm.png|thumb|500px|right|Realtime shadows]]
|}
</div>


==Availability/Code usage==
*{{Code|style=2|2014}} {{lw|4}} (Uses an enhanced version of ASD's deferred lighting implementation.)
*{{Code|style=2|TBA}} {{Directorscut|4}} (Initially. Switched to {{src13mp|4}}.)
*{{Code|style=2|TBA}} {{p2d|4}} ([[Light editor]] only, the rendering code for lighting has been rewritten from scratch.)

==Bugs==
*No hardware filtering support for {{amd|4|nt=0}}

==See also==
* [[:Category:Engine branches|Engine branches]]
*[[Alien Swarm engine branch]]
*[[Mapbase]]
*[[CSM]]

==External links==
*[https://code.google.com/archive/p/swarm-deferred/ Google Code page]
** Download is currently broken, see GitLab mirror instead.
*[https://gitlab.com/FriskTheFallenHuman/swarm-deferred/ GitLab Repository Download Mirror]
*[https://github.com/SCell555/sdk-2013-deferred 2013MP Port GitHub Repository]
*[https://www.youtube.com/watch?v=bMjXx-KweIo&t=135s YouTube] - Deferred lighting in action.
[[Category:Alien Swarm]]
[[Category:Open source mods and games]]
[[Category:Alien Swarm Deferred]]