## Geometry Shader Presets

List of available Geometry Shader presets. Geometry shaders are evaluated before rendering starts. This allows the shader to introduce procedural geometry into the scene. For example, a geometry shader might be used to create feathers on a bird or leaves on a tree.
For more information, see the user guide

Note | See Shader Presets for a list of different shader preset types. Also see Alphabetical Listing of All Shader Presets for a complete list of available shaders.

Preset | Shaders
--- | ---
Geometry\Geo_Cube.Preset | Cube Maker See the Softimage.sib_cuber.1.0 shader definition reference page. For an example of how to use this preset, see the ConnectGeoShader Example

### ConnectGeoShader Example

    function ConnectGeoShader( in_preset )
    {
            NewScene( null, false );
            var obj = Application.ActiveSceneRoot.AddPrimitive("GeoShader");
            Application.Selection.SetAsText(obj);
            CreateShaderFromPreset(in_preset, "GeoShader.GeoShader");
            var oShader = SIConnectShaderToCnxPoint("GeoShader.GeoShader.Geo_Cube.out",
                    "GeoShader.GeoShader.shader", false);
            if (!oShader) { return null; }
            return (oShader.Type == "XSICollection") ? oShader(0) : oShader;
    }