diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/DynamicBufferSource.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/DynamicBufferSource.kt
index 86dd7dfac..0b03fcb19 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/DynamicBufferSource.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/client/render/DynamicBufferSource.kt
@@ -57,6 +57,11 @@ private fun equals(existing: ImmutableList<RenderType>?, types: ImmutableList<Re
 	return true
 }
 
+/**
+ * Consider this class internal, because it is almost as rigid at Mojang's [MultiBufferSource.BufferSource]
+ *
+ * Allows to batch OTM's geometry
+ */
 class DynamicBufferSource(val minimalBufferSize: Int = 0) : MultiBufferSource {
 	private inner class State(
 		val type: RenderType,
@@ -297,7 +302,7 @@ class DynamicBufferSource(val minimalBufferSize: Int = 0) : MultiBufferSource {
 		var getState = buffers[renderType]
 
 		if (getState == null) {
-			getState = State(renderType, ImmutableList.of(after))
+			getState = State(renderType, ImmutableList.of(after), immutableAfter = true)
 			buffers[renderType] = getState
 			bufferList.add(getState)
 			sortBufferList()
@@ -311,7 +316,7 @@ class DynamicBufferSource(val minimalBufferSize: Int = 0) : MultiBufferSource {
 		var getState = buffers[renderType]
 
 		if (getState == null) {
-			getState = State(renderType, ImmutableList.copyOf(after))
+			getState = State(renderType, ImmutableList.copyOf(after), immutableAfter = true)
 			buffers[renderType] = getState
 			bufferList.add(getState)
 			sortBufferList()
@@ -325,7 +330,7 @@ class DynamicBufferSource(val minimalBufferSize: Int = 0) : MultiBufferSource {
 		var getState = buffers[renderType]
 
 		if (getState == null) {
-			getState = State(renderType, after)
+			getState = State(renderType, after, immutableAfter = true)
 			buffers[renderType] = getState
 			bufferList.add(getState)
 			sortBufferList()