If I set both “Source Radius” and “Source Length” of a point light, then its specular highlight cannot be occluded as shown on the GIF below. Is this a known issue? Is there a workaround?
(GI and Reflection have been turned off with PPV so I can exclude them from the equation)
UPDATE: using EnrealEngine 5.4.4
I was not able to repro this. What type of shadows are you using?
Hi Shaun,
Thanks for the prompt reply.
I’ve setup the project to use Lumen with HW raytracing; tried to max out everything since I want to create cinematic, so FPS is low prio.
If you need any other setting just alert me.
I appreciate you taking your time investigating this.
PS: in the meantime I’m installing 5.5 preview to see if the issue is still there
Aaaaaand the results are in: in UE 5.5 Preview the issue seemed to be resolved!
Oh I didn’t mentioned in the first post that I use v5.4.4 (I’ll update the orig post as well)
Turning Megalights ON in 5.5 brings back the issue. Interesting 
Thats fixed in our dev branch. I would not use ManyLight for anything other than messing around. There is some work to be done still.
I’m only doing a personal project right now. I’m all up for experimenting with new stuff 
But could you reproduce the issue in 5.4.4? I’d still like to fall back to that version if anything goes wrong with the preview one.
I can. You’re likely bumping into the light source shape intersecting the plane.
Unfortunately it’s not the case; there’s almost 1m between the two.
And you can see that the shadow is correct. Meaning the light itself doesn’t goes through the plane; only the specular highlight stays there. The fact that setting the lights “Specular Scale” to 0 makes that highlight disappear proves that as well.
Ahh I see. I’ll ask the engineers to have a closer look.
Thanks, much appreciated!
In the meantime I guess I’ll just replace the point light with 2 rect light positioned back to back.
