Texture Overrides

Creating texture overrides is a powerful tool for editing your USD scene, particularly for 2D and 2.5D scenes. They can also be used in combination with USD mesh creation to create textured cards, lightcards or 360 environments using textured spheres.

There are two different approaches to editing textures within a USD scene.

Overrides for Multiple Textures

You can create nodes and overrides for large groups of textures in your USD scene at once. To do this:

1.   Go to Project Graph > Scene > USD stage.
2.   In the Properties Panel, go to the USD texture graph option.

3.   There are two tickboxes that define the types of textures for which to create nodes from the scene:

• Select Image sequences to generate nodes from any time-sampled textures.

Tip:  It is recommended that all animated textures in a USD file should be authored as B44 encoded EXRs, and that nodes are created using this tickbox and button after a USD stage-load. Doing this allows Nuke Stage to playback the textures rather than letting USD do the image playback itself. This will improve playback performance.

• Select Single frames to generate nodes from non-timesampled textures.

Warning:  If your USD stage has a lot of textures it is not recommended to click this, as it will generate a huge amount of nodes in your USD textures graph.

4.   Click Create texture overrides.
5.   A USD_Texture_Graph will be generated with Read/Constant nodes connected to Output nodes. These nodes will mirror any existing images in the USD scene, and allow for adding effects to the existing textures or replacing it completely.

Overrides for Single Textures

You can create specific nodes and overrides for each texture by making them individually.

1.   Right-click a mesh or material from the Scene Graph.
2.   Click Create nodes for textures.
3.   This creates a single Read/Constant and Output node pair, which can be used for editing that USD object. After the initial node creation, to select those nodes that were created for a USD object, right-click in the Scene Graph and click Select linked nodes.