I get an error in the editor when I select objects that use a texture array 2d as their main texture. This does not happen during gameplay. It seems to happen when I select any object, 3d or 2d, whose shader is based on texture 2d. I'm using a customized version of the standard shader that I found on the Internet. Although it's not that complicated, mostly a find/replace of the use of texture2d with texture2darray and changes to types as needed. I've seen some suggestions that it would be better to not use _MainTex variable, but define another one. Would that be enough to fix it? Unity needs better workflow support for Texture2DArray. Or better documentation. And maybe the standard shader needs some love to make it easier to customize it. I'm not that experienced with practical techniques, although I've read a lot of serious documentation and tutorials. My use case seems … fringe.