Alpha Lightmap

Brings back the old darker Alpha/Beta lightmap.

Modifies the lightmap.fsh shader with a semi-reimplementation (Couldnt get GameTime in the lightmap shader, so had to compromise with SkyFactor) of the old lighting math.

In the screenshots i use Programmer Art Continuation Pack (PACP) with the Beta and Alpha addons.

This pack ONLY works for versions 1.21.2 and later. As the lightmap.fsh file was added in 24w33a here