Color hair root and tip

You can color spline primitives along their length by setting root and tip colors using custom shader parameters. Root and tip colors appear in the rendered Description, but not in the XGen preview.

1. Click the Preview/Output tab, and in the Custom Shader Parameters section, do the following:
   • In the space beside Name, type tip_color.
   • From the drop-down list beside Name, select color.
   • Click to create the parameter.

   The tip_color parameter appears in the Custom Shader Parameters.

2. Repeat step 1 to create a parameter named root_color.

   Use an expression to add color for the tip and root color.

3. Click this icon beside the parameters to open the XGen Expression Editor.
4. In the XGen Expression Editor, click the Samples tab.
5. Click the + beside Global and then + beside UI.
6. From the expression list that appears, click a color-related expression such as color_green.
7. Click Accept.

   The tip_color parameter is now set to green.

8. Click the color swatch to set a new color.
9. Repeat steps 4 to 8 for root_color.
10. Launch a renderer to render your Description.