SSMF features undocumented as of Spring 88.0

	skyReflectModTex (RGBA, A-channel unused)
		should be the same size as specularTex
		modifies the DIFFUSE color as follows

			diffuseColor.r = diffuseColor.r * (1 - skyReflectModTex.r) + reflectionColor.r * skyReflectModTex.r
			diffuseColor.g = diffuseColor.g * (1 - skyReflectModTex.g) + reflectionColor.g * skyReflectModTex.g
			diffuseColor.b = diffuseColor.b * (1 - skyReflectModTex.b) + reflectionColor.b * skyReflectModTex.b

		(before any other shading calculations use diffuseColor)

		can be used to suggest a surface composed of eg. ice or crystals

	lightEmissionTex (RGBA)
		should be the same size as specularTex
		modifies the FRAGMENT color as follows

			fragmentColor.rgb = fragmentColor.rgb * (1 - lightEmissionTex.a) + lightEmissionTex.rgb

		(after the diffuse + detail texturing stages and shadows,
		but before specular/dynamic lighting and fog are applied)

		can be used to accentuate eg. metal spots in shadowed regions

	detailNormalTex (RGBA)
		should be the same size as specularTex
		modifies the SHADING normal as follows

			shadingNormal.xyz = NORMALIZE(terrainNormal.xyz * (1 - detailNormalTex.a) + detailNormalTex.rgb)

		(normals are assumed to be given in tangent-space
		and with the usual XYZ2RGB encoding scheme, where
		texture.rgb = normal.xyz * 0.5 + 0.5)

		can be used to suggest surface details while keeping terrain flat

	parallaxHeightTex (RGBA)
		should be the same size as specularTex

		modifies the diffuse, normal, and specular
		TEXTURE COORDINATES before sampling is done

		height, scale, and bias parameters are packed
		as follows to produce a texel offset-factor f

			h = (parallaxHeightTex.r * 65280 + parallaxHeightTex.g * 256) / 65536
			s = (parallaxHeightTex.b)
			b = (parallaxHeightTex.a - 0.5)
			f = h * s + b

		the mathematics probably won't make much sense,
		so it's better to just experiment with this one
		(tip: you want to end up with small values for s
		and b, eg. s=0.04 and b=-0.02, so for now set the
		blue channel pixels to 10 and alpha channel pixels
		to 75 in your editing tool -- remember that from a
		graphics card's perspective the pixels have values
		between 0 and 1)

		can be used to suggest surface details while keeping terrain flat