http://imgur.com/a/COjo7

Whenever I try to run my map through the Launcher or ingame it gives me this error.

So I recently changed the skybox on my map from zm_factory to default_day because I felt it fit the theme better, but doing this brought on some unforseen issues.

First, while this issue had happened with the old skybox,it is much more noticeable with the new one. Basically, light from the skybox is "bleeding" through the walls and reflective off of them, which looks really bad. Is there any known way to fix this?

Second, when I changed the skybox I noticed that all light entities on the map no longer shine, like they were turned off.

Every time I load my map I get these errors:

[WARNING] You have placed exactly 1 riser struct in this zone (start zone). This will cause a script_runtime error unless you have installed the UGX Modtools Patch or at least one additional riser struct for this zone.

And:

[WARNING] You have placed exactly 1 dog struct in this zone (start zone). This will cause a script_runtime error unless you have installed the UGX Modtools Patch or at least one additional riser struct for this zone.

I don't have either a riser struct or a dog struct anywhere on the map. Help?