Mesh Terrain Material in Unreal Engine | Unreal Engine 5.8 Documentation

Mesh partition data is available in the Material graph. The available mesh partition nodes are:

This node provides the mesh partition channel texture to the material.

This node samples a mesh partition channel by name. You must specify a mesh partition definition to get a list of available channels.


Channel	Select a weight channel defined in the selected mesh partition definition. Select the MPD first to populate the list.
Mesh Partition Definition	Select a mesh partition definition asset from the content browser.

This node samples a mesh partition channel by reading it by index instead of doing so by name.

This node is used for debug purposes, it displays one unique color for each mesh partition channel.

This node returns the UVs of the mesh partition geometry.


UV	Regular UVs normalized for each mesh partition sections
UV [unit]	The UVs in 3D units, if a section is 100cm the UVs will go from 0 to 100 instead from 0 to 1.

A common use case is to read mesh partition weight channels as defined in the mesh partition definition. Proceed as follows:

Connect the Mesh Partition Resource node output to the Mesh Partition Channel Sample node input.
You can now read the channel of your choice, in this example the Gravel channel.
You can then use that channel to create various material effects, for example blending material attributes.