cod4-sdk/raw/statemaps/additive_stencil.sm

alphaTest
{
	mtlAlphaTest == Always && mtlBlendOp == Add && mtlSrcBlend == SrcAlpha && mtlDestBlend == InvSrcAlpha:
	mtlAlphaTest == Always && mtlBlendOp == Add && mtlSrcBlend == SrcAlpha && mtlDestBlend == One:
		GT0;
	default:
		passthrough;
}

blendFunc
{
	default:
		Add, InvDestAlpha, One;
}

separateAlphaBlendFunc
{
	default:
		Disable, One, Zero;
}

cullFace
{
	default:
		passthrough;
}

depthTest
{
	mtlDepthTest == LessEqual && mtlDestBlend == Zero:
		Equal;
	mtlDepthTest == LessEqual:
		LessEqual;
	default:
		Equal;
}

depthWrite
{
	default:
		Disable;
}

colorWrite
{
	default:
		Enable, Enable;
}

polygonOffset
{
	default:
		passthrough;
}

stencil
{
	default:
		OneSided,
		Equal, Keep, Keep, Keep,
		Always, Keep, Keep, Keep;
}

wireframe
{
	default:
		Disable;
}