You may have to remove some of the mods or disable them until you can identify the specific mod that is causing the conflict. If the problem is caused by a mod conflict, then you have to review the mods that you have installed and see if they are compatible with each other. Simply right-click on the game in your Steam library and select “Properties.” From there, select the “Local Files” tab, and then select the option to “Verify Integrity of Game Files.” This process will check your game files against the original files on Steam’s servers and replace any missing or corrupted files. If the problem is caused by a corrupted game file, then you need to validate the game files in Steam. Once you identify the name of the missing texture, you can begin the process of fixing it. The list may be quite long, so you can use the search function (CTRL + F) to look for the name of the missing texture.

This command will display a list of all the textures that are currently loaded in the game. Press the tilde key (~) to open the console and type in the command “mat_listtextures,” followed by enter. You can also use the console command to locate the missing texture. This message will usually identify the name of the missing texture, which can help you locate it and fix it quickly. The best way to know which texture is missing is to look at the error message that pops up on your screen.

Steam workshop gmod missing textures