In Z25, I have noticed the wall is bright, then goes dark when you get closer to it. Sorry if this is an old bug.

Quote from Furiously-Fast :

In Z25, I have noticed the wall is bright, then goes dark when you get closer to it. Sorry if this is an old bug.

I think it´s not testpatch related. I can remember having that bug for quite a long time.

Really really old issue. Though it's hard to call it an issue, it does help you when driving.