Built in Entities

For convenience, appleseed includes a number of built-in entity models, providing a robust foundation with no external dependencies. This document describes these built-in entity models in details.

Table of Contents

• 1. Built-in BSDF Models
• 2. Built-in Camera Models
• 3. Built-in EDF Models
• 4. Built-in Environment Models
• 5. Built-in Environment EDF Models
• 6. Built-in Environment Shader Models
• 7. Built-in Light Models
• 8. Built-in Material Models
• 9. Built-in Object Models
• 10. Built-in Render Layer Assignment Rule Models
• 11. Built-in Surface Shader Models
• 12. Built-in Texture Models

### 2. Built-in Camera Models

2.1. The pinhole_camera Model

2.2. The thinlens_camera Model

2.3. The spherical_camera Model

### 10. Built-in Render Layer Assignment Rule Models

10.1. The regex Model

Description

A regex render layer assignment rule allows to assign one or multiple entities whose paths match a given Perl regular expression (cheat sheet, examples) to a given render layer.

Parameters

Parameter	Presence	Description
pattern	Required	The regular expression pattern used to select entities.

Example

The following rule, called "rule1", assigns all object instances from the "truck" assembly to a render layer called "truck_layer":

<render_layer_assignment name="rule1" model="regex">
    <parameter name="render_layer" value="truck_layer" />
    <parameter name="entity_type" value="object_instance" />
    <parameter name="order" value="1" />
    <parameter name="pattern" value="scene/truck/.*" />
</render_layer_assignment>