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alphaTest

alphaTest.<program>=<off|func ref>

Location: shaders.properties

This directive is used to control the alpha test for cutout programs. For the compatibility profile the alpha test is applied automatically when using gl_FragData or gl_FragColor. For the newer syntax, only the reference value is passed through alphaTestRef and the function must be implemented by the shader.

Replace:

  • <program> with a gbuffers program name, including the dimension folder if relevant (e.g. world0/composite2). This does not work with Iris custom dimensions however.
  • <off|func ref> with off to disable alpha testing, or replace func with one of the following functions: NEVER, LESS, EQUAL, LEQUAL, GREATER, NOTEQUAL, GEQUAL, GL_ALWAYS. Replace <ref> with a reference value. The alpha value of the primary output will then be compared to this reference value using the function defined in func, and if it does not pass the value will be discarded (not written to the output buffer).