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Fixed
Votes
12
Found in
5.2.1f1
Issue ID
739221
Regression
No
[Freeze] Generate Lightmap UV's takes too long on certain model
Steps to reproduce:
1. Open attached project.
2. Select the wallCanyon_01LoA asset in the assets folder.
3. Open the model tab in the inspector
4. Select Generate Lightmap UV's & hit apply
5. Unity freezes
Reproduced with Windows 10 (64 bit) on 5.3.0b3 (b6181bece87a) and 5.2.1f1 (44735ea161b3)
OSX 10.11 using 5.3.0f1 (b948b362cb65)
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joschemd
Sep 07, 2017 20:18
5.6.3.p2 still has this issue
SoftFactory
Jul 26, 2017 15:07
5.6.2f1 and trying to generate those Lightmaps crashed my project... I had to dig up a backup
joschemd
Jul 24, 2017 22:55
using 5.6.2f1 and the issue is still there. UnwrapCL.exe is eating away at ~20% cpu usage for over an hour at this point loading the same fbx model and Unity is "frozen"
liquify
Nov 14, 2016 04:44
Checking the Generating Lightmap UVs checkbox for an FBX file that consists of hundreds of objects and millions of polygons will freeze Unity. I waited for more than 24 hours, but Unity still freezes.
Unity Customer Support, please resolve this issue. Please try to create an FBX file that consists of hundreds of complex models and millions of polygons, and import that FBX file by checking the Generating Lightmap UVs checkbox.
LuigiRift
Oct 04, 2016 13:42
I'm on 5.4.0, and this has messed up the project I've been working on for 2 years. I clicked Generate Lightmap UVs, it stalled for 3 hours, so I closed the process. Came back, the whole building I was working with was gone. Project is now just chairs floating in the freaking air. I know I have to re-import the asset...well, it's been showing the pop-up "Hold On" for 3 WHOLE DAYS! Nothing I can do. Had a deadline for end of this week, and now I don't know whether to just walk away and wait, close the program and try again (for the 3rd time), or just begin the whole project from scratch in Unreal Engine instead
ayyappa
Aug 25, 2016 17:44
Still happening in 5.3.5p8 !!!
Purple_Ice
Aug 12, 2016 19:06
Was this really fixed? I don't mind leaving my laptop overnight, but it's ridiculous that model which has 120k vertices literally took me 5hours for now and I still don't know how much progress was made, anyway, I hope something will be done about this, because I doubt one night will be enough...
Zyrathius
Jun 22, 2016 20:50
I'm having this as well in 5.3.4f1 Even FBX's as small as 2 or 3 MB are taking over an hour and sometimes just plain lockup and never recover. Often I think it's still going and just wait and it's still hung overnight. Sometimes I'm about to cancel and give up and then it's done. We seriously need more of an indicating it's still alive because whether it is actually working or hung up, we have no indication inside of unity of the progress and windows itself is useless as it always reports not responding, even in cases where it actually works.
Kumsan
Mar 29, 2016 10:38
having same issue with 5.3.2. even simple models take forever. i hope this gets fixed soon.
merlin981
Mar 02, 2016 17:57
Using 5.3.2f1, having this issue with any FBX. It runs forever, eats up all my RAM (I have 32GB available for Unity), and basically freezes.
I've tested on small models (10K polys or less, up to 200K polys)