Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

Directional Light - baking issue?

Hello Rendering Pro's!

On my way to lightbuild our maps, i figured that directional sunlight seems not to work as it should to be and now i'm kinda stuck in a deep rabbit hole between testing the hell out of it and reading through hundreds of tutorials for GI in UE4.

I created a test room setup to figure out why i can't see the directional light in an proper way:

Test setup:

  • One room with windows, UV Lightmap with 512 resolution, shadow option: two sided, simple dark grey material, one sided.

  • One Lightmass volume

  • One directional light with option "use lightmass" on. No other options changed, just the bare Directional Light.

  • Post Process volume for tweaking lightmass

First, it looks like the directional light is doing its job without GI (Picture 1)

Lightmap UV, seems ok (just rough Auto-UV) (Picture 2)

Result, the GI seems to do something but the sunlight is not baked into the UV's + weird results (production settings) (Picture 3)

Any hint or idea what i either forgot or doing wrong during the process of this simple task?

alt text

alt text

alt text

Product Version: UE 4.12
more ▼

asked Aug 31 '16 at 10:41 PM in Rendering

avatar image

51 3 8 13

avatar image Kajisan Sep 01 '16 at 01:48 PM

Ok, i figured something and this is utterly weird. I can't light-bake an directional light that is inside a sub-level. Is this a bug or a feature?

Since our current production is split into different workgroups, i am working on sub-levels for level design while the programmers are working inside the persistent root level. Since i'm not touching the Main (persistent) level, how can i circumvent this behavior?

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

0 answers: sort voted first
Be the first one to answer this question
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question