https://docs.unity3d.com/ScriptReference/Material.SetTexture.html The shader properties also show some of the keywords needed to set the Texture of a Material. To see this, go to your Material and right click on the Shader dropdown at the top. Next, pick Select Shader. Edit: Actually this may be a bug with the Linux version? Or perhaps with using a shader from "Universal Render Pipeline"? This is my situation. Clicking "Select Shader" did nothing. I found 2 ways to find out what keywords I can use; Note the name of the shader and attempt to manually browse to that shader in the Project view. For "Universal Render Pipeline/Unlit", I expanded the folders "Packages/Universal RP/Shaders" and selected "Unlit" and was able to see the keywords in the shader properties on the right. Instead of clicking,"Select Shader", I clicked "Edit Shader". This opens a text file where you can see a list of valid Texture keywords.