Summary
Hierarchical Instanced Static Mesh (HISM) issue in 5.5.1 HISM models not rendering until the UE editor viewport border is resized, clicked, or an editor UI element is clicked.
Please select what you are reporting on:
Creative
What Type of Bug are you experiencing?
Assets
Steps to Reproduce
Presumably, developers have access to my Marketplace asset (Floxy v1.05).
If so,
(1) open the ‘Floxy Stress Testing’ map
(2) Press PLAY and enable the ‘Show UI’ check box
(3) With the default [Native Agents] option selected, click [50] to spawn 50 HISM agents.
Expected Result
50 HISM agents (white arrows) should be spawned immediately as they always have prior to UE 5.5.1.
Observed Result
Even though the agents are spawned ‘programmatically’, they are not rendered for some reason …UNTIL you click anywhere outside of the UE 5.5.1 viewport,
e.g.,
- click the viewport resizing border
- click the UE editor’s Outliner tab
- click a blank area of the UE editor
- click an item in the Content Browser.
It’s as if the spawned HISM data is not updated until the editor has received some event.
I have no idea why that would suddenly be the case, but it only started with UE 5.5.1.
(Note: the bug only inhibits ‘dynamically spawned’ HISMs during PLAY).
See the linked video for the recorded repro.
Platform(s)
Windows 10 Home
Version: 22H2
OS Build: 19045.5247
Windows Feature Experience Pack 1000.19060.1000.0
System Information
Operating System: Windows 10 Home 64-bit (10.0, Build 19045) (19041.vb_release.191206-1406)
Processor: Intel(R) Core™ i5-9400F CPU @ 2.90GHz (6 CPUs), ~2.9GHz
Memory: 16384MB RAM
Available OS Memory: 16326MB RAM
DirectX Version: DirectX 12
Display Devices
Card name: NVIDIA GeForce GTX 1660 SUPER
Display Memory: 14128 MB
Dedicated Memory: 5966 MB
Shared Memory: 8162 MB
Driver Name: \System32\DriverStore\FileRepository\nv_dispig.inf_amd64_0afec3f2050014a0\nvldumdx.dll,
Driver Version: 32.0.15.6094
Feature Levels: 12_1,12_0,11_1,11_0,10_1,10_0,9_3,9_2,9_1
Video
Repro video:
https://1drv.ms/v/c/518700558eb31581/EUFPoyMZzM1Kvdu2a6DoiIMBpeyskCj6MfPZmJfkOzHhVQ?e=BHwTJR
Additional Notes
Repro video clearly shows the issue, comparing UE 5.4.3 (working) and UE 5.5.1 (not working)
