Open World Demo Collection freeze in Mac 4.7.4 version


Not possible to open maps (Overview, Showcase), editor is freezed since more than 5 min.
Cliff, rocks or foliage meshes could be open without problem but not Trees meshes.

Hello ,

Would you mind providing me with your system specifications?

For your own personal information, the open world demo pack uses 2048 and 8192 texture sizes as well as complex meshes and materials. The details of this pack can sometimes cause lower end machines to freeze up or become unresponsive when attempting to load for the first time. This is a known issue and we are working on optimizing the pack so it functions better across more platforms.

Thank you,

Hello ,

I’am working on MacBook pro (current Apple generation) 2.6 Ghz i7, 16 Go Ram DDR3 and 1 To SSD running on OSX 10.9.5

Sorry, NVIDIA GeForce GT 750M 2048 Mo

CUDA Driver Version: 7.0.29
GPU Driver Version: 8.26.28 310.40.55b01

How about your GPU?

Great, thank you for providing me with the requested information. If I have any new discoveries about this issue I will let you know.


Not platform problem i think, mine is freezing with this specifications:

Windows 7 64 bits

4096MB RAM

AMD Athlon™ II X4 640 Processor (4 CPUs), ~3.7GHz

GeForce GTX 760 4gb

I can not open any mesh, even with max low settings in viewport

Hey guys,

I experience the same issues you are, but if I wait long enough my asset will eventually load. The issue here is as I stated before. Some of the assets use the maximum texture resolution and have a very high polygon count. The engine needs to calculate and account for this which is what it is attempting to do when you see the freeze.

Along with that, if your computer is not as performant as some, the engine could become unresponsive when attempting to calculate. As mentioned earlier, we are working to improve upon this pack so it works across a wider range of machines. Remember, the GDC demo was used to display the power of the Unreal Engine, so the assets used are going to be high resolution and quite detailed.

If you have any other comments or concerns, or if you need additional assistance please let me know.


Hi, I’m having the same problem[with opening trees… I haven’t tried to leave it to see if it eventually loads, gets stuck at about 50 percent and after a few minutes I just ended the task.

I’m running on the following;
windows 8.1
intel core i7 x980
20gb ram[2000mghz]
1 TB ssd
NVidia gtx 980

I’ll try and leave it for a while longer to see if it loads and report back.

It turns out I just needed to give it a few minutes to load… all the trees are loading fine now on my end.