Intro to Shaders 

What is a shader and what does it do, how is it used?

The [[https://icculus.org/gtkradiant/documentation/Q3AShader_Manual/|Quake 3 shader manual]] states: 

//
Shaders are short text scripts that define the properties of a surface as it appears and functions in a game world (or compatible editing tool). By convention, the documents that contain these scripts usually has the same name as the texture set which contains the textures being modified (e.g; base, hell, castle, etc,). Several specific script documents have also been created to handle special cases, like liquids, sky and special effects.// 



For Tremulous, .shader files are located in the //Tremulous/base/scripts// folder 

More info:

[[https://github.com/ioquake/ioq3/blob/master/opengl2-readme.md#materials|ioquake3 opengl2 renderer Materials]]

[[https://web.archive.org/web/20041028022648/http://www.doom3world.org:80/phpbb2/viewtopic.php?t=6617|Quick and Dirty Material Shader Primer [Doom3World.org]]]

Examples:

<Code:none linenums:0 |Example shader for portal effects: //portals.shader//>
models/fx/portal/bluering
{
	surfaceparm nodlight
	surfaceparm noimpact
	surfaceparm nolightmap
	surfaceparm nomarks
	cull disable
	{
		map models/fx/portal/bluering.tga
		blendfunc add
		rgbGen identity
		tcMod scroll -0.2 0
	}
}

models/fx/portal/bluecenter
{
	portal
	surfaceparm nodlight
	surfaceparm noimpact
	surfaceparm nolightmap
	surfaceparm nomarks
	cull disable
	{
		map models/fx/portal/bluecenter.tga
		blendfunc add
		rgbGen identity
		tcMod rotate -5
	}
}

</Code>

Image:\\
{{:tremulous:i2iac.jpg?direct&400|}}

==== Shader resources ====

[[http://dl.grangerhub.com/#files%2Fdownloads%2Fdev%2Fshaders|Shader manuals and tools]]  \\
[[https://web.archive.org/web/20161122073424/http://bpeers.com/software/q3ase/]] \\
[[https://web.archive.org/web/20170101173938/http://www.bpeers.com/software/q3ase/q3asetutorial.html|Tutorial for using Q3ASE]] \\

https://web.archive.org/web/20071019012918/http://www.doom3world.org/phpbb2/viewtopic.php?t=6617

Image formats used and tools
Model formats used and tools

[[:tremulous_3d_modeling|Player model export resources]]

[[https://web.archive.org/web/20041010094900/http://www.4thdimented.com:80/dimented_tutorialQuake3_1.htm|"Getting a Model into Quake 3" - (Tutorial's for 3DSMax, but everything also applies to Blender)]]

[[https://web.archive.org/web/20130526010027/http://lee.fov120.com:80/iqm/|IQM format information]] Archive.org mirror of http://lee.fov120.com:80/iqm/

[[http://web.archive.org/web/20010826133822/http://www.cybermodels.co.uk:80/html/Digital_painting.htm|Digital painting character textures]]

[[https://web.archive.org/web/20180821181752/https://www.quake3world.com/forum/viewtopic.php?f=10&t=4650|Modeling & Skinning Tools, Tutorials, & Resources]]


==== Unorganized ====


https://web.archive.org/web/20080814142637/http://www.poopinmymouth.com:80/tutorial/normal_workflow.htm
https://web.archive.org/web/20040812105640/http://www.cyberloonies.com:80/bump-mapping.html
https://web.archive.org/web/20040807155141/http://freespace.virgin.net:80/hugo.elias/graphics/x_polybm.htm
https://web.archive.org/web/20060320055922/http://www.doom3world.org:80/phpbb2/viewtopic.php?t=10585
https://web.archive.org/web/20061203031810/http://www.telefragged.com:80/soup/terra_tut/terra_tut.htm

https://web.archive.org/web/20071104225323/http://www.grsites.com:80/textures/
https://web.archive.org/web/20031218133302/http://www.planetquake.com:80/simland/pages/article1/a1.htm
https://web.archive.org/web/20040805064441/http://www.telefragged.com:80/soup/envmapusage.htm
https://web.archive.org/web/20160321000904/https://www.iddevnet.com/quake4/ArtReference_SpecularMaps

[[http://www.poopinmymouth.com/#tutorials|Ben Mathis]]

https://web.archive.org/web/20120512032907/http://www.gamasutra.com/view/feature/131701/creating_backgrounds_for_3d_games.php?print=1