Hey guys, any one can tell me what’s going on with these lumen reflections? I switched to 5.6 and the Lumen Scene and Reflections look like like a Sega CD video lol.
Reflections on 5.6
Here’s the Lumen Scene 5.6, which looks bad as well
Here’s the same scene in 5.2
Lumen Scene in 5.2
Any idea on what’s going on?
Thanks!
Hello there @leoviale!
From your provided screenshots, the first thing that crosses my mind is that your current value for rendering the reflection resolution could be a bit low, test by incrementing it for better results, as seen in the UE documentation below:
Adjusting Reflection Probe Resolution
You can globally adjust the resolution of the HDRI Cubemaps that are used for the Reflection Capture Actors by doing the following:
- Open up your Project settings by going to the Main Toolbar and then selecting Edit > Project Settings
- From the Project Settings menu go to the Engine > Rendering section and then look for the Reflections option. By adjusting the Reflection Capture Resolution option you can increase or decrease the size of the HDRI Cubemap Texture that was specified.
Please note that the Cubemap Resolution will only work with numbers that are powers of 2 like 16, 64, 128, 256, 512, and 1024. When using values other than a power of 2, it will be rounded to the nearest accepted resolution value. Also, be extremely careful when using high resolution values as it will dramatically affect performance due to the GPU memory requirements.
As for further adjustments with Lumen, the guide below helped me a lot on my own projects, when dealing with metal and glass:
Changing the Reflection Mode to either Hit Lighting or HL for Reflection did the trick. Surface cache looks like it’s getting some weird compression artifacts or something like that.
On the other hand, is there a way to increase the reflection rays or something to avoid the blotchy reflections on translucent surfaces overlapping?
This is the reflection I should get
Actually, the Lumen scene stays the same, so it’s not that
Was this project migrated?
Would you be able to start a new project and import the assets needed for the scene? Sometimes migrating a project from one version to the next breaks things.
Yes, it was migrated. I was trying to avoid having to do that. It seems to me that this is not a smart way to move from one version to another. There should be a more straightforward way to handle it.
Also, there’s a lot of work, and it’s a personal project, so I rather find another solution, or just deal with it as it is tbh.
I also have this issue, this is a core issue inside Unreal 5.6, I tried everything, migrate, clone, new project, change cvars, project settings, change shadow methods, raytracing (cached, hit lighting, hit lighting for reflections), nothing worked, this a problem inside Lumen:
UE5.5 Left - UE5.6 Right
Look how pleasant the colors are in UE5.5, and how the colors break in UE5.6 (Lumen scene)
I noticed the same thing… funny thing is, they claim Lumen works better in 5.6 lol. 
I mean, if they want to give Sega CD video vibes, I’m all for that, but also give us the crisp filter as well lol.
