Manipulation of Class "worldspawn"

As the title says, I can’t seem to change things like color and material of worldspawn.

Example:
[lua]
for k,v in pairs(ents.GetAll()) do
v:Color(255,0,255,255)
end
[/lua]
Turns everything but the actual map a bright pink.

Help?

You can’t just change the map’s material. Source isn’t built as such (afaik?).

Aiight, thanks. I’ll just use HUDPaint