<cat>Model.Advanced</cat> <title>Custom Vertex Weights</title>⤶ <title>Vertex Normals</title>⤶ # Introduction **Custom Vertex Weights/Normals** come with the engine to provide support for mid-poly to low-poly models to use weighted normals that were done in external 3D software.  **Source 2** accepts custom normals, but it is hidden away at the moment and is checked off. <note>This will **uncompress** your vertex data with 32bit, **default** (compressed) is 8bit</note> ## Custom Normals on your model We need to add **RenderMeshMarkup** to the mesh you want to apply it to: <upload src="b0065/8dabd05117b3c07.png" size="6306" name="search.png" /> Then we need to check **"Use Expensive Tangents"**: <upload src="b0065/8dabd059671a1be.png" size="11179" name="tangents.png" /> Here is a before and after: <upload src="b0065/8dabd0ad2b404ed.png" size="334183" name="beforeafter.png" />