Creating a New Texture

To create a texture resource:

1. From the Resource Browser, select New Resource > Renderworks Texture from the Resources menu.

The Edit Texture dialog box opens. Specify the shader parameters. Shader types and properties are described in Renderworks Shader Types.

Click to show/hide the parameters.

Parameter	Description
Name	Specifies the name of the texture resource
Shaders	Sets the type of shader or combination of shaders to use, and specifies the shader parameters
Color	Color shaders apply a color or pattern to the surface of an object. Select a color shader from the list, or choose Object Attribute to apply the object’s fill color attribute. Image-based shaders require the selection of an image file. After selecting the shader, click Edit to edit the shader properties.
Reflectivity	Reflectivity shaders control how much light is reflected from a surface. Select a reflectivity shader from the list (or select None to exclude this type of shader from the texture). Image-based shaders require the selection of an image file. After selecting the shader, click Edit to edit the shader properties.
Transparency	Transparency shaders control surface transparency or opacity. Select a transparency shader from the list (or select None to exclude this type of shader from the texture). Image-based shaders require the selection of an image file. Mask-based transparency shaders create a transparent mask from an image based on specified settings. After selecting the shader, click Edit to edit the shader properties.
Bump	Bump shaders apply a texture with bumps or dimples to an object surface. Select a bump shader from the list (or select None to exclude this type of shader from the texture). Image-based shaders require the selection of an image file. After selecting the shader, click Edit to edit the shader properties.
Size	Sets the real-world size for each repetition of the texture. If applying a brick shader, specify whether to adjust the brick dimensions proportionally to match the change to the texture size.
Set By Image	For image-based textures, opens the Set Image Size dialog box, to set the texture size using the image (see Setting the Texture Size by Image)
Shadows
Cast	Allows objects with this texture to cast shadows (for rendering modes that display shadows)
Receive	Allows objects with this texture to receive shadows (for rendering modes that display shadows)
Surface Hatch	Displays the name of the current surface hatch resource, for use in hidden line rendering with surface hatches. Surface hatches are an aspect of textures.
Edit Surface Hatch	Opens the Edit Surface Hatch dialog box, to select the surface hatch to associate with the texture, and to align and register the surface hatch and texture (see Editing Surface Hatches)
Preview Options	The Preview window displays the effects of shader and size selections on a preview object
Preview Controls	Adjusts the preview position and magnification. Click Pan and drag the preview to the desired location. Click Zoom In or Zoom Out and then click and drag to create a marquee; this zooms in or out on a particular section of the preview. Click Fit to fit the preview to the window (according to Obj Size).
Obj Type	Select the type of preview object from the list; for procedural (non image-based) shaders, the Flat object type is automatically used to create a preview for OpenGL rendering to approximate the look of the solid shader
Obj Size	Specifies the preview object size
Shader check boxes	Select to preview the associated shader; deselect to exclude the shader component from the texture preview
Indirect Lighting Options	Opens the Indirect Lighting Texture Options dialog box, to set any overrides for the texture when rendering with indirect lighting (see Setting Indirect Lighting Options)
Revert	Returns the texture parameters to the original settings, undoing any changes

2. Click OK to create a texture with the name and properties specified in the Edit Texture dialog box. The texture displays in the Resource Browser and is saved with the file (the texture preview in the Resource Browser uses the Flat preview object at twice the texture size for ease of identification).

Setting the Texture Size by Image

For image-based shaders, the real-world size of each texture repetition can be set based on a segment of the image.

To set the size of an image texture based on the image:

1. Select the image to use for the texture, as described in Creating Image-based Shaders.

2. In the Edit Texture dialog box, click Set By Image. If several image-based shaders are used, select the shader with the desired image in the Choose Image dialog box.

The Set Image Size dialog box opens. Red handles flash briefly to indicate the location of the line segment.

3. Specify the image length to use for sizing the texture by dragging the line segment into position, and then dragging the ends of the line segment. If necessary, use the mouse scroll wheel to zoom into and out of the image, or click and hold the mouse wheel button to pan.

When the line is indicating the desired real-world length, specify the real-world size for the line segment in Feature Size.

4. Click OK to exit the Set Image Size dialog box and update the Size value.

Setting Indirect Lighting Options

To save rendering time, it is possible to override the indirect lighting settings for individual textures (see Setting Lighting Options).

To set indirect lighting overrides for a texture:

1. From the Edit Texture dialog box, click Indirect Lighting Options.

The Indirect Lighting Texture Options dialog box opens. Specify whether, and to what degree, the texture should override the indirect lighting options.

Click to show/hide the parameters.

Parameter	Description
Override Indirect Lighting	Sets whether the texture should participate in indirect lighting calculations
Emit Light	Select this option if the texture should both receive and emit light
Receive Light	Select this option if the texture should receive light but not emit it
Portal	Select whether surfaces that use this texture serve as portals for light transfer, such as exterior windows. This setting affects only renderings that use both indirect lighting and physical sky or panoramic image backgrounds for lighting.

2. Click OK.

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Creating Image-based Shaders

Renderworks Shader Types

Editing Textures and Shaders

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