vRay IES lights

V-Ray V-Ray for 3ds Max General
1

Hello all

I have a question regarding IES lights and physical camera. I feel like im getting it completely wrong i setup my physical camera as i would use a normal cmaera settings in an indoor space shutter speed and iso etc. when i put in the IES lights using vRay IES light and ies files from ERCO light scout and well i always have to crank my IES files up to something crazy. I always assumed you dont need to adjust the IES files power as it is accurate…

are my unit settings incorrect? here they are:

Display unit scale
-Meters
Lighting Units
-international

System Unit Scale
-Millimeters

i feel kinda like an idiot here :confused: so any help would be greatly appreciated thanks!!
Ryan

2

Could you perhaps post a simple file with the issue?

Best regards,
Vlado

3

Maybe it is because you haven´t set up the System Unit right. If you set the Display Unit Scale to Millimeters, than you have to set the System unit like this:

1 Unit = 0,0001 Meters

1 Meter equal 1000 millimeters.

rog!