diff --git a/mappings/net/minecraft/client/render/BufferBuilder.mapping b/mappings/net/minecraft/client/render/BufferBuilder.mapping
index 7f6e8cbb90..62605ddbda 100644
--- a/mappings/net/minecraft/client/render/BufferBuilder.mapping
+++ b/mappings/net/minecraft/client/render/BufferBuilder.mapping
@@ -17,6 +17,7 @@ CLASS net/minecraft/class_287 net/minecraft/client/render/BufferBuilder
 	METHOD method_1324 restoreState (Lnet/minecraft/class_287$class_5594;)V
 	METHOD method_1326 end ()V
 	METHOD method_1328 begin (Lnet/minecraft/class_293$class_5596;Lnet/minecraft/class_293;)V
+		ARG 1 drawMode
 		ARG 2 format
 	METHOD method_1334 popState ()Lnet/minecraft/class_287$class_5594;
 	METHOD method_1335 grow (I)V
@@ -28,6 +29,8 @@ CLASS net/minecraft/class_287 net/minecraft/client/render/BufferBuilder
 	METHOD method_22892 grow ()V
 	METHOD method_22893 isBuilding ()Z
 	METHOD method_23477 reset ()V
+	METHOD method_23918 setFormat (Lnet/minecraft/class_293;)V
+		ARG 1 format
 	CLASS class_4574 DrawArrayParameters
 		FIELD field_20779 vertexFormat Lnet/minecraft/class_293;
 		FIELD field_20780 count I
diff --git a/mappings/net/minecraft/client/render/VertexFormat.mapping b/mappings/net/minecraft/client/render/VertexFormat.mapping
index 39d198a255..c44b5c62e0 100644
--- a/mappings/net/minecraft/client/render/VertexFormat.mapping
+++ b/mappings/net/minecraft/client/render/VertexFormat.mapping
@@ -10,3 +10,28 @@ CLASS net/minecraft/class_293 net/minecraft/client/render/VertexFormat
 	METHOD method_22649 startDrawing (J)V
 		ARG 1 pointer
 	METHOD method_22651 endDrawing ()V
+	CLASS class_5595 IntType
+		FIELD field_27371 BYTE Lnet/minecraft/class_293$class_5595;
+		FIELD field_27372 SHORT Lnet/minecraft/class_293$class_5595;
+		FIELD field_27373 INT Lnet/minecraft/class_293$class_5595;
+		FIELD field_27375 size I
+		METHOD <init> (Ljava/lang/String;III)V
+			ARG 4 size
+		METHOD method_31972 getSmallestTypeFor (I)Lnet/minecraft/class_293$class_5595;
+			COMMENT Gets the smallest type in which the given number fits.
+			COMMENT
+			COMMENT @return the smallest type
+			ARG 0 number
+				COMMENT a number from 8 to 32 bits of memory
+	CLASS class_5596 DrawMode
+		FIELD field_27377 LINES Lnet/minecraft/class_293$class_5596;
+		FIELD field_27378 LINE_STRIP Lnet/minecraft/class_293$class_5596;
+		FIELD field_27379 TRIANGLES Lnet/minecraft/class_293$class_5596;
+		FIELD field_27380 TRIANGLE_STRIP Lnet/minecraft/class_293$class_5596;
+		FIELD field_27381 TRIANGLE_FAN Lnet/minecraft/class_293$class_5596;
+		FIELD field_27382 QUADS Lnet/minecraft/class_293$class_5596;
+		FIELD field_27383 mode I
+		METHOD <init> (Ljava/lang/String;IIII)V
+			ARG 3 mode
+		METHOD method_31973 (I)I
+			ARG 1 vertexCount