If you do not have your Model Details set to High then cars in-game will look like spikes and spaghetti.
You can fix this by going on 'Options > Video > Advanced' and setting the Model Details to High however you should only do this whilst not being on the server else this may crash your game and your settings will not save. Once this is done, restart your game and join the server as normal.
Counter-Strike Source Content is no longer required for assets as our own content is used instead and bundled with PERP's content pack.
Install the content by subscribing to every item in the Workshop Content Pack. Once the download is complete, you can proceed to the next steps.
There is a likely chance that you may have some conflicting addons from the workshop/other servers and may cause issues with our content. It is highly recommended that you uninstall all of your addons that are not needed to play on the server. To unsubscribe from all of your addons at once, follow these instructions:
Having followed these instructions, quit the game, then purge your Garry's Mod folder of any remaining downloaded content.
To do this, right click on Garry's Mod in your Steam library > Properties > Local Files > Browse... to be taken directly to your Garry's Mod directory.
Next, open the garrysmod folder, and then you're ready for the next step.
Within your garrysmod directory, select the following folders by holding CTRL and clicking on them to select several folders at once:
If any of these exist in the Steam\steamapps\common\GarrysMod\garrysmod directory, delete them by right clicking on one of the folders you have selected and click on Delete.
Deleting these folders will remove any files that Steam failed to remove. If you don't have one or more of these folders, just delete the rest of what remains. After doing this, you can now join the server and your content should be fixed.
If you've got to the end of this guide, and you still have issues with your content, then you should create a support post over on the forums or join the Discord Server and post a message in #help-and-support.
If you have any issues with content, ask for help in our /help chat in-game, or contact a staff member on the forums.