I just modeled this object that I'm going to be using in a bathroom. I tried importing it into Unreal Engine but when I do the mesh becomes black after light building. People said I have to create a UV lightmap so I looked up tutorials but first I need to UV unwrap twice since Unreal Engine takes the second UV as the lightmap. I have no clue where to start UV mapping since the urinal part dips in. I understand the top sensor part since its just circles and spheres, but its the other part I'm confused about.

Object mode:

enter image description here https://gyazo.com/788809e77f70e60108258f7820b38c36

Edit Mode: https://gyazo.com/ecbdebe1bdebc22820bbe4fab8123176

Here's a view from the inside: Object Mode:

enter image description here https://gyazo.com/0ca128321a4e9b5726f2f4e6304865b0

Edit Mode:

enter image description here https://gyazo.com/5e0349a89a71de55d54bad68987847f9

Can someone please just say where I should mark seems?

  • $\begingroup$ First, just try to make any flat surfaces one face. select one face on a flat surface and hit CTRL + SHIFT + ALT + F and then dissolve the selection by hitting X and then dissolve faces. This will make some things less complicated. $\endgroup$
    – Hendriks3D
    Commented Jan 8, 2017 at 20:14
  • $\begingroup$ Ok thank you for that it did clear some room up and removed some vertices for space in the game. However, I still need help on what corners I should mark seems so I can unwrap it because of the part it dips in. $\endgroup$
    – HighKyle
    Commented Jan 8, 2017 at 20:18
  • $\begingroup$ That would be easier if you hadn't used the bevel modifier yet. $\endgroup$
    – Hendriks3D
    Commented Jan 8, 2017 at 20:19
  • $\begingroup$ I haven't yet. I only beveled where it curves like this: gyazo.com/e2f87a90e9892bce2cc2c15db3ff1c87 $\endgroup$
    – HighKyle
    Commented Jan 8, 2017 at 20:22
  • $\begingroup$ You should be read the The tutorial of UV Mapping it may can help you. And you can look more and read more many tutorial in there, thanks $\endgroup$ Commented Nov 8, 2017 at 10:03

1 Answer 1


Never mind everyone I did a UV Smart Project and it looks like this:

enter image description here

Would this be good for making the light map and stop the overlapping?

  • $\begingroup$ Please use the built in tool to post images so that they display as part of your post. Use the answer section for answers only, not to ask additional questions. To ask a new question please use blender.stackexchange.com/questions/ask $\endgroup$
    – user1853
    Commented Jan 8, 2017 at 23:52
  • $\begingroup$ Can someone answer my question and I won't have to make a new answer for it to be at the top of the forums. Just a simple yes or no. Can a smart UV project be good for lightmapping and stop my mesh from being black when I build lighting\? $\endgroup$
    – HighKyle
    Commented Jan 8, 2017 at 23:53
  • 1
    $\begingroup$ please reat the help center section to understand how this site works. This is not a forum but a question and answer site. $\endgroup$
    – user1853
    Commented Jan 8, 2017 at 23:55

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