Imported Lighting Looks Different

Archive V-Ray for Unreal V-Ray for Unreal :: Issues
1

Hi,

After importing my scene into Unreal the lighting looks a lot different to what I’m getting in Max, so I’ve had a check and all of the intensities and values are different in Unreal. I have a mix of IES and Vray lights, and not one of the lights has the same value as Max.

Is this expected behaviour, and if so, what am I supposed to do in order to accurately match what I get in Max, other than trial and error??

Any feedback will be much appreciated.

Thanks, Michael.

2

Hi, Michael

In UE the light intensities are converted to Lumens. So the values for V-Ray lights that you used in Max (ie Rectangle light 10/10cm, Units = Default Image, Intensity=10) will be calculated and converted on import (the Rectangle light will be imported with Intensity=150). The IES light are different thing however. V-Ray and Unreal handle IES profiles differently and mismatches are expected.Can you send screenshots of the scene in max and UE and/or the vrscene for us to test?

Best regards,
Alexander

3

Thanks Alexander,

So really the only lights that should be making it look different are the IES ones, I’ll ramped their values up and see if I get any closer to the Max lighting.

I’ll look at getting the vrscene to you too, its worth noting that with the IES file I was using, the UE values were consistently a 10th of what the value was in Max

Cheers, Michael.