Mesh Proxy_Color Mode

Feature Overview

Steps

1. Color Separation in DCC

• Split mesh vertices by proxy relationship, setting different vertex colors for different regions.

• Method 1: Paint model vertex colors.

• Method 2: Use color ID maps.

• In face mode, select mesh faces and assign new materials (regular Lambert works).

• Assign different colored materials to all meshes.
  

• Copy the mesh.

• Select Bake -> Transfer Maps to bake and export UV maps with colors.
  • Target Mesh: Copied mesh.
  • Source Mesh: Mesh with grouped materials.
  • Diffuse Color Map: Storage path and file name.
  • Transfer: Select UV space.
  
  
• Find the baked ID map in the directory.
  
• Use the above method to get the ID map for the simulation mesh (no need for a new UV set for the simulation mesh, UV0 channel can be used).

2. Setting Up Proxy in UE

• Create the simulation mesh as a clothing asset using the generic mesh simulation function to create it as a Style3D clothing asset from the FBX.
• Proxy Mode:
  • Click Proxy Mesh Proxy Mode, add a render mesh skeletal mesh component, and set the Offset.
  
  • Show Mesh Colors: Check Show Color to display vertex colors in the 3D window.
  
  • Load Color Map (Optional):
  If no color map is configured, the model's vertex color is displayed. If a color map is configured, the color of the map is displayed.
  • Wrap Color Texture: Enter the color map in the respective fields.
    • Proxy Color: Render mesh color map.
    • Piece Color: Simulation mesh color map.
    • UV Channel: UV channel to apply the map.
      
  • Creating Proxies:
    • Clear all proxies by right-clicking before creating new ones.
    
    • Method 1: Automatically create proxies for areas with the same color by right-clicking and selecting Auto Color Proxy Link.
    
    • Method 2: Manually create proxies by selecting the mesh of the simulation and render meshes and right-clicking to Create Proxy Link.
  • Mesh Selection Notes:
    • Single-clicking the simulation mesh selects the piece, single-clicking the render mesh selects the section.
    • Double-clicking either mesh selects the topologically connected same-color area.
    • Shift/Ctrl + single-click adds/removes pieces in the simulation mesh or sections in the render mesh.
    • Shift/Ctrl + double-click adds/removes color areas.
      
    • View Proxy Relationships: Hold Alt and double-click the color area of the render mesh to simultaneously display the simulation mesh with proxy relationships.
    
  • Clear Proxy Relationships:
    • Select a color area, right-click, and choose Clear Proxy Link to clear the current proxy relationship.
    • Right-click and select Clear All Proxy Link to clear all grouped proxy relationships.
    
  • Save and Apply Proxies: Click Bind to apply all created and modified proxy relationships. Reset render mesh offset and hide the simulation mesh.
    
    

Common Issues

• When both index proxy relationships and color grouping proxy relationships exist for a piece, the color mode proxy (higher priority) is used. If no color mode proxy exists, the index mode proxy data is used.