View source for Community Roadmap - Alpha Depth Test

== Revision History ==
=== Second Write, Sept 13, 2008 ===
XML Shader code altered:

&lt;TestConfig /&gt; tag was removed and replaced with &lt;AlphaTest /&gt;, &lt;DepthTest /&gt;, and &lt;AlphaToCoverage /&gt;

All tags have an "enabled" paremeter which determines whether they are active or not.

AlphaTest supports a "mode" parameter which may be, "less", "gequal", "lequal", "equal", or "greater".
AlphaTest supports a "value" parameter which is a floating value that designates the comparison value for the test.

DepthTest supports a "mode" parameter which may be, "less", "gequal", "lequal", "equal", or "greater".

AlphaToCoverage now only functions if the EngineOption "Samples" is set to a value greater than 0, as it should.

'''Improvements'''
All test modes are available.
XML Syntax is simpler and quicker to read by humans.
=== First Write, Sept 12, 2008 ===
Implemented Alpha test, Depth test, and Alpha to coverage. All modes default to the expected settings.

Using the syntax &lt;TestConfig alphaTest="true" alphaMode="greater" alphaValue="0.5" depthTest="true" depthMode="less" alphaToCoverage="false"/&gt;

'''Limitations'''
Supports only GL_LEQUAL or GL_GEQUAL for the test modes.
TestConfig tag is unintuitive for alphaToCoverage. It's also very longwinded for complicated testing.