Glowmask/Emissive Rendering Changes

As of 5.0, GeckoLib no longer supports .mcmeta-based glowmasks. This was a rarely used and inefficient system anyway, and has been fully superceded by the texture-based glowmask system.

Additionally, GeckoLib5 no longer modifies the base texture when using an emissive texture. This means that you can selectively/conditionally/dynamically apply a glowmask without having missing chunks of your texture.

See the Glowmasks/Emissive Rendering page for more details