Hey
Where is the code that you posted located in the engine? I was able to find SetTransientTextureOverride() but I did not find a SetTransientOverrideTextureValue() function in the engine. Additionally, I’m not sure I understand what you’re trying to accomplish. It sounds as though the textures you want to use are not assets in the project, is this accurate? Are you able to import the textures into the project rather than trying to access them from somewhere else?