ok, so a was making my map when randomly the lighting got messed up. A lot of the walls are really bright and look wet.

Reflection probe in radiant?
Lightgrid in radiant?
Check your worldspawn settings.
Make sure compile lights is checked in launcher.

Reflection probe in radiant?
Lightgrid in radiant?
Check your worldspawn settings.
Make sure compile lights is checked in launcher.

What is the lightgrid? Also, can you post a picture of what the worldspawn is supposed to look like, and I woud like to post a picture of what i am talking about, but i dont know how to attach pictures from my computer onto these messages.

So to put it simpler.

1: Make sure you have this things called reflection probes above or below ALL your lights. They are found by right clicking in the 2d grid.

2. Like codmoddd1234 said, make sure you put a lightgrid around your ENTIRE map.

3. This may sound obvious, but there are WET textures which make the walls glittery. Make sure they are NOT wet textures. If they aren't, then it's just COD's graphics.

4. Make sure your lights are not too bright. Experiment with the intensity and radius of your lights by pressing N and fiddling with the 2 KVPs

5. And finally make sure to compile your map with compile lights in launcher like Codmoddd1234 said.

Just wanted to add to his post really. 

ok, so a was making my map when randomly the lighting got messed up. A lot of the walls are really bright and look wet.

you sure you havent used a "_wet" texture or something?

or "_blend"

and thing after fixed with "_something" has a specific use, youll usually find a identical file that doesnt have that

but i dont know how to attach pictures from my computer onto these messages.

image hosting, you can download and take pictures with Gyazo, and itll upload it for you, then you just copy the link over ( on gyazo need to click the paper clip for forum images, or just put .png at the end )

or just upload photos to something like tinypic - and again copy the link over using image tags