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"

Object looks strange after light build


I have a strange issue, I built a couch in Blender and textured it with substance painter. In Blender and Substance Painter, everything looks fine. It also looks fine after importing it to UE4 and setting up the materials, but after building the light, it looks totally strange, see image 1 image 2.

It looks like an issue with the UVs, but UE4 does not complain about them while importing. I am using Blender's Smart UV Projecting with the default settings. I joined all objects together before unwapping.

I only have this problem with this model. Any ideas?

Thanks for your help!

Product Version: UE 4.20
i2.jpg (55.8 kB)
i1.jpg (23.7 kB)
more ▼

asked Sep 07 '18 at 04:24 PM in Rendering

avatar image

21 1 4

avatar image Przemek2222 Sep 07 '18 at 05:11 PM

Change lightmap resolution in static mesh settings.

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

2 answers: sort voted first


I guess when "you" lay down your uv islands you use an automatic flatten map... well those cuts you see are the same as on your (lightmap) uv islands! Yeah you can raise your lightmap resolution and those will disappear by time... BUT a better solution is to have a proper lightmap with a proper resolution! ;) Keep rounded surfaces together and have those cuts where it's a hard edge or where it's not visible!

more ▼

answered Sep 07 '18 at 05:33 PM

avatar image

1.3k 4 4 8

avatar image pes04 Sep 08 '18 at 08:43 AM

Hi, thanks for your answer!! So I tried out to raise the lightmap resolution, but it did not get better. I also searched for lightmap tutorials on Blender and UE4, but this also did not work out. I tried to generate the lightmap with UE4 also with the lightmap of Blender as a source. Do you have any links or tutorials for me as a recommendation? :D

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

Stich your UVs to avoid this issue.

more ▼

answered Sep 10 '18 at 07:07 AM

avatar image


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