Different Indirect Lighting from PIE/Simulate

Something very weird is happening to my lighting.
It’s getting different result from PIE and Simulate. Is there any reason for this?

The lighting is correctly built and the object is set to movable.
This is the same problem that I have posted 3 days ago

But it is now extending to a new issue as I am still unable to solve the original problem.

Pretty sure there’s no issue with indirect lighting.

Hi @,

Would you mind providing some reproduction steps for me so I can try to assist you. I have attempted to reproduce this issue on my end with no success thus far. What specific settings are you using in the lightmass settings and on your mesh?

Thank you!

Lightmass/Lightsource settings

I’m still trying to find steps to reproduce it. But so far it’s all inconsistent. Here’s a video on what’s going on. I"m attaching it. link text

The first 2 changes are using Simulate. The last one ( as shown by the popup) is a PIE.

IF you do notice it. I’ve duplicated several vehicles at different scale. The lighting across them is inconsistent.

Hi @,

Does this occur with any other assets or just with the one you have used in the video?

Thank you,

Definitely not the asset. I’ve thrown in some stock shapes and the same thing happened as long as I set the mobility to Movable. However apparently it only happen in this map. I’ve spend hours trying to isolate the issue, I’m pretty sure it’s tied to the map. I’ve stopped working on that map and restarted a new map. the problem went away, not that I’m still using the same assets. If this happen again. I will upload the map , and perhaps someone could see if it’s happening on other machine as well.