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the Output Settings

 in the Preview/Output

 tab of the XGen window are as follows:

Operation

is set to Render

and Renderer

is set to VRay.

1. the Sigma

1.  button of an attribute. In this example, we

1. control

1. the Length attribute.

A pop-up window appears

.

2. Increase

the Map Resolution

 to about 200. This is the resolution of the PTex map in texels per-face. Use larger values for high resolution textures.

Name the map as you wish, and

click Create.

2. If you wish to use an image file, open

1. the Hypershade

1.  and Node Editor

1.  and click on the icon circled below next to

1. the Length attribute.

here.

4. Select the file texture and load the texture map that you wish to use to drive the length of the primitives. Texture maps with higher contrast work better for controlling attributes.

1. the Save

1.  icon next to the attribute. Always remember to save after changing a texture map, Otherwise XGen will not refresh, and the changes will not be visible in the viewport or renders.

1. Using a bitmap like the one shown below left should correspond to a view in the viewport like the shown below right

1. .