In the Mesh Operations list, under Mesh Operations > Vertex Map, double-click Set Edge Weight. In the Item List, select your mesh item and in the 3D viewport, select the edges for which you want to set weights. You can set edge weight values on a subdivision map using the Set Edge Weight mesh operation. When enabled, the Map Value is added to the current map value. When disabled, the current map value is set to the amount specified in Map Value. The weight value to be applied to the selected elements. Note:If Map Type is set to Weight Map and the map can't be found, a new Weight Map is created. For more information on the differences, see Working with Weight Maps. Set if you want to use a Weight Map or a Weight Container. This mesh operation can take a Vertex, Edge, or Polygon selection. Sets the coordinates from Local Space to World Space where vertices are defined relative to an origin common to all the objects in a scene. Adjust the Map Value to set the weight value.Įnables/disables the Set Weight mesh operation. If you have Show Weightmaps enabled in the Default view, the selected part of the mesh is colored red in the 3D viewport, indicating that the default 100% map value is assigned to it. Set Map Name to the name of the Weight Map you want to use, in our example, 'pWeight'. Note:For more information on Weight Maps and Weight Containers, see Working with Weight Maps. A Weight Map is embedded on the mesh, while a Weight Container is a separate item. In the Set Weight Properties, select the Map Type you want to use. This adds the Set Weight mesh operation to the list and opens its properties in the Properties panel on the right pane. In the Mesh Operations list, under Mesh Operations > Vertex Map, double-click Set Weight. 
In the Item List, select your mesh item and in the 3D viewport, select the vertices, edges, or polygons for which you want to set weights.In the Vertex Maps list on the lower right, under Weight Maps, select the weight map you created.You need to create a Weight map for your mesh, as described in Creating a New Vertex Map Procedurally.
Tip:Enable the Show Weightmaps button at the top of the 3D viewport to see the weight values in the viewport, or press O and ensure Show Weightmaps is selected in the Active Meshes tab. You can set weight values to a specified Weight map using the Set Weight mesh operation. Tip:You can select the vertex map associated with the selected mesh operation by clicking Select Map, so you don't have to manually select vertex maps from the Vertex Map List.
RGBA - Defines a vertex color map based on red, green, and blue color values and an additional transparency (Alpha) value.Your new Vertex Map is created and listed in the Vertex Map List. RGB - Defines a vertex color map based on red, green, and blue color values. UV Seam - Stores information on the seam edges from a UV map. Weight - Stores weight strength values for falloffs and texturing. You have the following Map Value options: 
In the Create Vertex Map Properties, enter a new Map Name and Map Value. The Create Vertex Map mesh operation is added to the list and its Properties are displayed on the right pane. In the Mesh Operations list, click Add Operator, and under Mesh Operations > Vertex Map, double-click Create Vertex Map. 
The Create Vertex Map mesh operation allows you to create a new vertex map from the Mesh Operations list. The Mesh Operations List opens on the right. Click the thin bar above the 3D viewport, indicated by a small arrow in the middle.The easiest way to access the Mesh Operations list is using the Modo layout. Tip:For more information on procedural modeling and mesh operations, see Procedural Modeling. The tools are accessible from the Mesh Operations List. You can create Vertex maps and assign weight values, seams, and RGBA values to them non-destructively using mesh operations.
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