Normal Rotate


  • Where to find it:


    • Add Adjustment Layer / Extension Pack / Normal Map /


    • NodeGraph / Right Mouse Click / Nodes / Filter / Extension Pack / Normal Map /






Normal Rotate allows you to rotate the vectors of a normal map without changing its general orientation.


Extension Pack Nodes utilizing Image data (e.g. Image Node, Axis Projection etc.) have built in normal map orientation support.

The Normal Rotate node is a separate node version of this built in rotational support



Normal Maps imported as textures and created from other applications have a fixed orientation. Rotating the imported normal map after the fact in Mari

will result in incorrect lighting direction calculation if the vectors of the normal map are not recomputed to account for the new rotation.


Below you can see an example of the effect of an incorrectly aligned normal map, where the original material/normal map was rotated 90 degrees inside of Mari


Node Overview




Node Ports


  • Normal Map

The Normal Map Input stream to rotate


  • Normal Format

Overwrites the Normal Format Dropdown of the Node. The Input value should be 


    • 0 - DirectX
    • 1 - OpenGl


This can for example be inherited by a Normal Format Converter Output


  • Rotation Map (0-1,optional)

A black to white (0-1) map defining the values to rotate the Normal Map.

The Rotational Map is evaluted in addition to the Angle slider in the Node Properties



Node Properties


MAIN TAB

Main


  • Angle

The Angle in degrees (0-360) to rotate the normal map vectors


  • Normal Format

The Format the fed in Normal Map is in. 


If you are unsure what format the normal map is in, view the output of the node and tweak the Angle.

Colors should always stay in the same orientation (top, bottom, left, right).


If they shift when modifying the angle, you are using the wrong normal format



Mirror


  • Mirror U/V

Mirrors the vectors of the Normal Map.


Mirroring is applied before rotation