The five stars go for the effort of this evolution. But unfortunately they have removed the graphic from the concrete walls, which now have the drains and the possibility to place real images on the trackskin. Also, in principle, you can not give color to the Tyrewalls.
I will continue using the previous version.
Let's take this into the discussion thread so we can get to the bottom of your issues.
Do you mean we cant change the colour of the tyre walls via a skin? If so you can still do this by editing the texture that is used for them in the 'extension' folder.
And, sorry but I'm not sure what you mean about the drains on the concrete walls.