Texture System - Arnold for Katana
Note:
When using Arnold, it is best to use a tiled mipmapped texture format such as .exr or .tx that has been created using maketx.
Auto-TX
The ArnoldGlobalSettings has two options available to activate and control auto-creation of tx textures from source textures. By default, texture_auto_generate_tx is off as many users have manual TX texture creation pipelines (running maketx manually), but it can be activated when you are ready. This generates .tx textures next to your source textures, or using texture_auto_tx_path to specify a local directory to deposit textures for your machine. It is important to keep the auto-generated textures local so that multiple render nodes or workstations do not stomp on each other when generating textures automatically.