Why do tanks look like they drove through the sewers on desert maps after a minute of driving?

[SemiPartician]

This just isn’t realisitc, after almost 1 minute of driving through a dry desert our tanks become covered in mud. MUD!

Sand generally is supposed to look like this on tanks which have been driving for hours in deserts:

Clean. Not covered in literal dung

[Vianočka]

You can also use Rallye cars as reference…

[Silver_Alert]

Just go back to the hanger area and your cyber minions will have the tank squeaky clean and ready for your next explosive death. Easy peasy!