Creating a Texture Bed

The texture bed site modifier can convert a 2D polygon into an area of the drawing that can be textured. For example, texture a lawn with grass, a terrace with bricks, or a sand trap with sand for a photorealistic rendered appearance. To draw a texture bed, either use the Site Modifiers tool, or draw a polyline and then select the Create Objects from Shapes command (see Creating Objects from Shapes).

To create a texture bed:

1. Click the Site Modifiers tool from the Site Planning tool set, and click Texture Bed mode from the Tool bar.

2. Draw the texture bed.

The properties can be edited from the Object Info palette.

Click to show/hide the parameters.

Parameter	Description
Simplification Tolerance	Enter a positive value to redefine the horizontal distance between the closest parts of two neighboring portions of the modifier. A longer distance simplifies the modifier polygon, reducing the number of source points that modify the site model. A shorter distance increases the number of source points that modify the site model. A value of 0 (zero) does not simplify the modifier.
Modifier Vertex Count	Displays the number of vertices created by the site modifier to modify the site model
Config	Indicates the type of modifier object
Apply To	Specifies whether the site modifier applies to the existing or proposed site model
Texture from Class	The classes present in the drawing are listed; alternatively, create a new class by clicking New, or select the class named <Site Modifiers Class> to derive the texture and its associated surface hatch from the class of the site modifier. The indicated class should have a texture applied on the Other tab, with Use Textures/Surface Hatches At Creation selected. See Applying Object Textures by Class.
Show 3D	In 3D views, enabling this option represents the texture bed with a 3D polygon; deselect this option to hide the geometry and display the texture bed only with its texture
Update Calculations	Updates the area and volume calculations displayed in the Object Info palette for the area of the site model located under the site modifier
Site model area and volume data	Displays the area and volume information for the site model area located under the site modifier; select the units for the area and volume. For more information, see Site Model Properties.
Vertex parameters	Edits the path vertices; see Editing Vertex-Based Objects

See Textures and Shaders for more information on textures.

3. To reflect the texture bed modification, select the site model and click Update from the Object Info palette.

4. Render the model with a Renderworks render mode to see the texture bed.

Mapping Images on the Site Model

Images can be mapped to the surface of the site model; for example, use an aerial image of the site. Unlike the texture bed, which is a site modifier, mapping of an image texture occurs from the Render tab of the Object Info palette, and is adjusted with the Attribute Mapping tool.

To map images on the site model:

1. Create an image texture as described in Creating Image-based Shaders.

2. Select the site model. From the Object Info palette, select the image texture from the Texture list on the Render tab.

3. Switch to a 3D view from the Views > Standard Views menu, and render the site model to view the mapped image.

4. Click the Attribute Mapping tool from the Visualization tool set to position, move, resize, and rotate the image texture. Mapping adjustments are constrained to the 2D texture space plane; the image cannot be skewed or tilted.

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Mapping Fills with the Attribute Mapping Tool

Textures and Shaders

Applying a Texture to an Object

Direct Texture Mapping

Rendering Modes

Updating a Site Model

Site Model Modification Overview

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