--- a/com/mojang/blaze3d/vertex/BufferBuilder.java
+++ b/com/mojang/blaze3d/vertex/BufferBuilder.java
@@ -459,4 +_,14 @@
          this.f_276566_ = p_277855_;
       }
    }
+
+   // Forge start
+   public void putBulkData(ByteBuffer buffer) {
+      m_85722_(buffer.limit() + this.f_85658_.m_86020_());
+      this.f_85648_.position(this.f_85652_);
+      this.f_85648_.put(buffer);
+      this.f_85648_.position(0);
+      this.f_85654_ += buffer.limit() / this.f_85658_.m_86020_();
+      this.f_85652_ += buffer.limit();
+   }
 }