[4.3-4.4 Bug] Building Sky Occlusion takes forever (1-15 min on fast comp)

Development Platform & Builds
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1

Dear Friends at Epic,

I am working from the race track map that Epic provides with the vehicle demo.

When I save the map, a process starts that proclaims it is building Sky Occlusion

This process varies from taking 1 to 15 minutes!

Every time I save!

if I move actors = 15 minutes

if I repeat save = about 20 seconds

but what is it?!

I want to delete whatever is making it do this!

It is making it really hard for me to work with this map!

I also really want to know what it is and why it takes so long, it is pretty unmanageably slow

#Specs

win7
intel i7 core
GTX 680
16gb ram

#Pic

12805-skyocclusion.jpg
12805-skyocclusion.jpg900×639 148 KB

Thanks!

Rama

PS: I reported this entire post while waiting for Sky Occlusion to finish, it just finished :wink:

2

Hey Rama -

The SkyOcclusion textures are this maps names for certain lightmaps. I have not dug through the code to see where they are created but they are generated form the first light build in the lightmass calculations. Short of converting entirely to Dynamic lighting these textures will exist. You can adjust the overall lightmap resolution downward which will make the textures smaller.

Thank You

Eric Ketchum

3

I do think they take way too long and hopefully some one can look at this, it sometimes take literally 12 minutes, and the progress stopped at 11% for me and my team mate on different computers, looking like a real hang or a crash for almost 15 min.

This happens any time any object is moved in the world and then I save the map.

So please consider having someone look at this!

Thanks!

Rama

4

I have the same problem , It started after 4.4 . Map is my own work but saving the map it hangs on the same place , compressing sky occlusion . Before 4.4 it took a couple of seconds , now it takes a couple of minutes , not as much as 15 , but compared to before when it took about 30sek-1min , now it takes 3-5 min . It’s running on a i7 4770k @ 4.6 ghz . Hope someone takes a look at this , and it gets better in next iterration of the engine .

5

I’ve started researching this more closely and I will get back to you both on what I discover.

Thank you for the report -

Eric Ketchum

6

Thanks Eric!

Rama