You can change those 2 things in the scenario and scenario structure bsp files in guerilla. (2nd one for backround noise, 1st for skybox) in sapien, You will have to run radiosity_quality 0, radiosity_start, and radiosity_save in sapien. This is so the new skybox can generate new lightmaps.
Edited by MEGASEAN2812 on Apr 3, 2015 at 01:27 PM

that depends, if its singleplayer you need 2 bsps, one for day, one for night

1; in guerrilla search the scenario,
2; in sky change that one for a night,sky, its in sky/a50/ etc.
3;save it, close guerrilla open tool and write in the comand: tool lightmaps levels/yourmap/yourmapscenario "yourbsp" 0 0.999
Wait until its finish

Enjoy

that depends, if its a multiplayer level that is already there like bloodgulch or death island put that name like this:

tool lightmaps levels\test\bloodgulch\bloodgulch bloodgulch 0 0.9999

^^^^directory ^^^scenario ^^^bsp

and thats it. if you still have problems later tell us the exact errors

Pictures would help... makes it easier to see whats wrong. try rendering lightmaps in sapien. tool lightmaps have never worked correctly for me...

in sapien press this: ~ key

Then type:

Radiosity_quality 0

Then after that type:

Radiosity_start (make sure you exit the console with ~ after you do this)

After a while (leave it be for about an hour depending on your pc) type

radiosity_save

And voila, youll have darker lightmaps. (assuming you actually changed the sky in the scenario XD)

Edited by killzone64 on Apr 8, 2015 at 12:27 AM

Hmmmmm...pm the hole folder of your map or scenario whatever you named it, later I will send you the files

Edit: NVM, I think you really have a problem with permision, try to Rin it with administrative priviliges, the go to folder with some data, somebody explain this please, I dont how to do it
Edited by EmmanuelCD on Apr 8, 2015 at 07:44 PM

Make sure you change the sky tag in Guerilla. Are you sure you ran the tool commands properly? In sapien, did you run the commands properly? If you could get any pictures or footage of the problem then we will be able to better understand the problem.