why my HDA file create mesh in Unity is one material,while the geometry is muti-material in houdini,I do not know the reason,who can help me,I learn Houdini just more than one month by myself.
e-mail: hnsun@entangle.games

You need to assign material on primitive in Houdini via unity_material attribute. If you need multiple materials you can just create multiple ‘attribute_create’ nodes and assign corresponding primitive group to each attribute_create node. https://www.sidefx.com/docs/unity/_materials.html [www.sidefx.com] - also this link can help you.