In the context of Foundry Katana, a .dll file (on Windows) is typically one of the following:
Files that allow Katana to communicate with render engines like Arnold , RenderMan , or V-Ray . Katana (1).dll
Part of Katana's API used to customize the 3D viewport . 2. How to "Install" or Load the DLL In the context of Foundry Katana, a
Katana does not automatically search your entire computer for plugins. You must tell it where to look using : OpWrite — Katana Developer Guide - Foundry Learn In the context of Foundry Katana