Thea for Rhino adds Thea properties to Rhino models. Those attributes can be configured by selecting the Thea Object Properties icon.
Enable: makes the object invisible. It will also not be visible in reflections/camera and will not cast shadows.
Visible: Hides the object from the camera. It will still be visible in reflections and will cast shadows.
Scatter Visible: The object will not be visible in reflections and refractions.
Shadow Caster: Defines whether the object will cast shadows or not.
Mask Index: Used along with the Mask render channel. Objects with a value greater than zero, will make Thea for Rhino to generate a separate channel for them when Mask channel is enabled.
Assign Container: Assigns the selected material as a container for the object.
Shadow Receiver: gives to the models the property to get shadows that other models may throw on them. By disabling it, the model will throw shadows to the rest scene, but will receive no other shadow.
Caustics Transmitter: If true, then this surface will produce caustics on another surface.
Caustics Receiver: If true, then the surface will show caustics produced by another one.
Subdivision: Subdivides the surface in render time. Two methods to choose from: Planar or Charles‐Loop. Subdividing a surface can help displacement to give a better result. This is especially useful for flat surfaces having a few triangles.
Level: Defines how many times the surface will be subdivided.
Weld Vertices: Welds the vertices of the selected object.
Enable: Turns on or off the back face material support.
Material: Select the material that will be used to the back face of the surface.
Enable: Enables/Disables the beveled edges option.
Angle (degrees): This value allows the user to limit the effect of beveled edges to corners with an angle greater than the one defined here.
Radius (cm): Defines the radius of the beveled edges in cen meters. When the material of the object uses the Edge Ramp procedural, the same value will be used for the width of the edges.
Projection: Allows the user to select a custom projection that will override the texture coordinates of the objects. The default option will use whatever mapping is being used from Rhino.
Rotation: Rotates the texture coordinates.
Cutoff/Sharpness: Both parameters control the blending of the projections. Values range from 0 to 1.
Note: Projection and Triplanar options act as overrides allowing the user to make changes per object.