Hello all,
Just wondering why is it necessary to raise vray IES light power to so high power to be able to see it
i usually set it to somewhere around 500.000!
lets say i wanna translate this to watts or lumens? what would be the math here?
thanks a lot for any reply
best regards
You will need to use correct scene units for your scene to get accurate results with IES lights.
Best regards,
Vlado
so if my scene is in centimeters, what does power 500000 correspond to?
IES light stregth
I have had similar difficulty with getting IES to “work”
I do wonder if the actual IES files does not play a role in this.
My scenes are always modeled at scale 1:1 and in mm.
I have the same issue. Scenes always in 1.0 mm…
When these lights are switched on I have difficulty viewing the scene too, areas go white making viewing the geometry difficult, any cure for that?
its important to choose good units when u start a new project as with some u can easily go out of scene bounding box…but still the question remains…
if there is a scnene in mm, cm or m…what does a certain power value of the ies light correspond to?
i also think it depennd on the initial power of the ies file as well, but still…would eb nice to know more
do you guys use the physical camera? if so do you use realistic exposure-settings? When you create a new vray physical camera the exposure is fine for outdoor scenes with vray sun/sky, but way too dark for say an indoor scene lit with ies-lights…
I rarely use ies-lights myself, so i dont know if this is your problem… just a thought.
/k
well thats mostly why am asking…as i have to turn the ies lights waaaaay up to be able to view the map nicely:)
I run physical camera and adjust the exposure to suit an internal render. Not sure what setting the light is on, I just turned it up untill I got the effect I was looking for. But the whiteout of geometry is difficult to work with, so I end up switching the lights off to work… and that cant be right
im using ies light in a current project, the scene is in meters, phisical cam setting ( iso 8oo shuter speed 5 fstop 3.5" as u would set up a camera when shooting at night & the result im getting are very realistic without adjusting any of the IES power