I am working on big Interior Office Project where I have a lot of lights. When I turned on lights in Lumen, Lumen could not process those lights. The lights slow down the performance in UE5-Preview. The FPS drops to 2-3 FPS which makes it impossible to move the scene. If I turn off the lights and keep only the Sky light, the FPS increase to 30-40 FPS.
I wish Epic Games would solve these problems with Lumen for Unreal Engine 5 Final Version so I can do animations for my project.
Were you able to break the previous max world size limit (around 21km x 21km) with âEnable Large Worldsâ ticked ? I couldnât 
@Astaraa I can confirm that like this it works (mostly). I do get an initial black screen/nomap but then after short it shows the correct map
If the Kill Z is in effect, it would have still died at 21km (10.4km +/-) but ours is disabled (grayed). I had also unchecked the World Bounds below the Enable Large Worlds boolean. Just to be certain I wasnât speaking out of turn, I just ran out to 258km and back with no issues or artifacts.
@Amanda.Schade How DO YOU manage to download UE 5 preview !? I have tried coutnless times using the latest EPIC installer/launcher and I see no option to install on my new win 10 PC workstatiion - it was hit and miss to get UE4.27 - it âjust appearedâ after clicking around for an hour !?
Are there current bugs ?
Should I go back to a previous installer ?
Thanks,
The flat inner ceiling is a separate object, but I can try to separate the curve too. Donât you think the actual geo would have same sampling issue though. Not only have sampling issue in reflection. Also notices the perforation I have seems to be phased out after about 1ft in the reflection aswell so still feel like the reflection is being dumbed down.
@VVR_Keddie +1 ! thanks for this - you have ended several hours of head scratching - new here and have found even posting new topics next to impossible as its asking for tags in the title (ie engine ref but even if you copy the syntax that pops up in the red dialogue box - it still wouldnât let me post!?
The install is so lame - no guides showing how to find those versions! so Thanks again!
Is datasmith available in Unreal 5 Preview?
Hi @VoodooStudio,
This post answers the question of how to install 5.0 Preview 2 alongside other binary versions. You will need at least 20 GB. For performance purposes, this should be installed on SSD/NVRAM.
Thanks @Jimbohalo10 - its making more sense now how the installer works/functions. Yes the download is quite large over 35gb now I think but its on a fast SSD.
Hi @VoodooStudio,
I have a very low spec GTX 1050 graphics card and a 32GB pagefile, UE5 Preview 2 BINARY was able to convert 4.27 Slayer
Slay Animation Sample in Engine Feature Samples - UE Marketplace (unrealengine.com)
Which always crashed in EA versions, so this is really good progress for 4.27 conversions because those 4.27 samples now work under 5.0 Preview
Yes
For the volumetric fog. When I try to use TAA which means turn on the r.volumetricfog.temporalreprojection, it will show strang dark zone while i move my viewport somewhere. I know it is because of the Temporal stuff. But when i checked in the new matrices in ue5, seems good for me to go. So really have no idea about this.
Ok, maybe the limitation I encountered was specific to landscapes and the world partition feature then. It seems that some of the engineâs world-building features are still subject to its old limits.
Possibly the kill wall canât be turned off when that feature is on? But definitely, if you exceed the Kill Z limit, it will destroy your character. We tested this in 5.0 P2, on one of our ground levels and passing 14.2km from world origin (21km total distance), would drop our player character from the Outliner leaving only a camera component. It wasnât related to the problems we were having and we have no ground levels that let you wander that far out, so we didnât worry about it. The limitation we hit was in our flight levels and we already had no Kill Z set. If that is the problem and the Kill Z canât be defeated, it would seem setting world origin would fix it. I donât know how to do that on 5.0 yet, I had to disable it as part of the conversion since it was all based on FIntVectors in 4.2x and below, and I assumed if I reinstate re-basing, it would have to be done differently. So far everything is working in our levels without re-basing.
Is anyone else experiencing this:
MP4 Videos are just black but you can hear the sounds from it. Everything else works normally. If you change to Webm format then it seems to work but its very unstable and often crashes while loading the video to play.
This has been happening since EA2 and is still occurring on P2. You can convert to Webm, however playing those seems unstable and itâs hit or miss for the engine crashing in editor and package builds. You can usually get 1 to play then the next one you play crashes.
same here ⌠the WMF Plugin is broken âŚ
take a look in the log⌠i get this error with every MP4:
LogWmfMedia: Error: Tracks 00000AB558F3AA10: Format is not supported in D3D12.
(the tracks id is different from file to file)
Thank you, Thank you so much! You save my life
Yup thatâs the same one we get. Does it work if you set the RHI to DX11? Apparently that seems to work, but so much else gets broken in the process.
