Support overlay texture when other block is not visible

[ModProg]

Image explains it best, the jungle planks are connected at the top but not at the side

I'm using Stay True.

This is the properties file:

matchBlocks=birch_planks dark_oak_planks crimson_planks warped_planks
method=overlay
tiles=0-16
connectBlocks=acacia_planks

Textures in question:

[ModProg]

Maybe it makes sense to make this optional? I could imagine a slight performance loss and/or a behavior that not everyone expects.

[AlsoSylv]

Well this behavior isn't ideal, it does match Optifine

[ModProg]

Well this behavior isn't ideal, it does match Optifine

IMO this should still be implemented if possible. Maybe with it being off by default.

[Malachi-lewis]

You could reuse the innerSeams tag that is available for ctm as a way to change this