vray IES double sided

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

hello vlado

It seems that vray IES lights are double sided! every light also lights up the ceiling. this looks strange, because it then lights the lamp, too.

…and this target… you cannot create a free light with one click. when you create a light, then you always have to reorient the light if you wont have a target.

best regards
themaxxer

2

The lighting information comes from the IES profile; many light fixtures have openings at the back for cooling reasons which allow some of the light to shine from the back.

Best regards,
Vlado

3

thanks vlado
but, why there’s a difference between vrayIES and photometric lights from max? this double sided problem only appears with vrayIES and not with photometric IES from max.
I will make a test and upload it later.

best regards
themaxxer

4

No idea, but if you send me the IES file at vlado@chaosgroup.com I will look at it.

Best regards,
Vlado

5

i had the same issue as well, no idea why its doing it…

6

Because that data is actually in the IES file. Why 3ds Max does not show it, I don’t know. It can be argued which version is an error.

Best regards,
Vlado

7

ill bet its maxes error :slight_smile: far more probable than its a vray error :))))

8

Well i must say we too have had this problem, so we stick to max’s ies… sorry //