Option to skip rendering of hidden extra leaves

src/main/kotlin/mods/betterfoliage/client/config/Config.kt

@@ -62,6 +62,7 @@ object Config : DelegatingConfig(BetterFoliageMod.MOD_ID, BetterFoliageMod.DOMAI
         val vOffset by double(max=0.4, default=0.1).lang("vOffset")
         val size by double(min=0.75, max=2.5, default=1.4).lang("size")
         val dense by boolean(false)
+        val hideInternal by boolean(true)
     }
 
     object shortGrass {

src/main/kotlin/mods/betterfoliage/client/render/RenderLeaves.kt

@@ -45,7 +45,8 @@ class RenderLeaves : AbstractBlockRenderingHandler(BetterFoliageMod.MOD_ID) {
     override fun isEligible(ctx: BlockContext) =
         Config.enabled &&
         Config.leaves.enabled &&
-        LeafRegistry[ctx, DOWN] != null
+        LeafRegistry[ctx, DOWN] != null &&
+        !(Config.leaves.hideInternal && ctx.isSurroundedBy { it.isFullCube || it.material == Material.LEAVES } )
 
     override fun render(ctx: BlockContext, dispatcher: BlockRendererDispatcher, renderer: BufferBuilder, layer: BlockRenderLayer): Boolean {
         val isSnowed = ctx.blockState(up1).material.let {

src/main/resources/assets/betterfoliage/lang/en_us.lang

@@ -114,6 +114,8 @@ betterfoliage.leaves.dense=Dense mode
 betterfoliage.leaves.dense.tooltip=Dense mode has more round leaves
 betterfoliage.leaves.snowEnabled=Enable snow
 betterfoliage.leaves.snowEnabled.tooltip=Enable snow on extra leaves?
+betterfoliage.leaves.hideInternal=Hide internal leaves
+betterfoliage.leaves.hideInternal.tooltip=Skip rendering extra leaves if leaf block is completely surrounded by other leaves or solid blocks
 
 betterfoliage.shortGrass=Short Grass & Mycelium
 betterfoliage.shortGrass.tooltip=Tufts of grass/mycelium on top of appropriate blocks