Variable Nodes

These are the value nodes included with Poser. Unless specified otherwise, the list of attributes for each node is listed from top to bottom.

dNdu

The dNdu node represents the derivative of the surface normal in the ‘U’ direction. In other words, it defines the rate of change of the surface normal along ‘U’.

dNdv

The dNdv node represents the derivative of the surface normal in the ‘V’ direction. In other words, it defines the rate of change of the surface normal along ‘V’.

dPdu

The dPdu node represents a varying point surface shader variable. It is a vector perpendicular to the surface normal in the ‘U’ direction. Specifically, it indicates the derivative of the surface position along ‘U’. It has no user-definable attributes.

dPdv

The dPdv node represents a varying point surface shader variable. It is a vector perpendicular to the surface normal in the ‘V’ direction. Specifically, it indicates the derivative of the surface position along ‘V’. It has no user-definable attributes.

Du

The dU node defines the rate of change of surface parameters as pertains to the current pixel’s location in S space. The ‘d’ indicates a derivative of the ‘U’ parameter.

Dv

The dV node defines the rate of change of surface parameters as pertains to the current pixel’s location in T space. The ‘d’ indicates a derivative of the ‘V’ parameter.

Frame Number (frame_number)

The Frame Number node returns the current frame number. It has no user-definable attributes.

N

The N node returns the normal at the specified point. It has the following attributes:

N Node.

 

• X: The X attribute is the normal vector’s X component.
• Y: The Y attribute is the normal vector’s Y component.
• Z: The Z attribute is the normal vector’s Z component.

Visualizes direction of surface normal.

P

The P node defines a point in space. It has the following attributes:

P Node.

• X: The X attribute is the point’s X location.
• Y: The Y attribute is the point’s Y location.
• Z: The Z attribute is the point’s Z location.

U Texture Coordinate (u)

The U node returns the S coordinate in texture space of the pixel currently being rendered. It has no user-definable attributes.

V Texture Coordinate (v)

The V node returns the T coordinate in texture space of the pixel currently being rendered. It has no user-definable attributes.