Vray and ies lights?

[doujay888]

Hi Guys,

 

 

 

I know lot of you guys here uses Vray, Well Im new to it. I Hope you can help me with this. I have attached a test render using two different kinds of lightings, one common renderer which is Vray and common rendering settings.

The darker image is rendered using ies lights while the other image I use

Vray lighting. My question is, is it possible for me use the ies lights with

Vray? since ies lights are more accurate because lighting values comes from

the manufacturers and as per light specifications. So how can I adapt the

ies in Vray? Coz otherwise I'll end up again to radiosity.

[Craig Ramsay]

Yes of course you can use IES light with Vray. Just set them up exactly the same way as you would in max but change the shadow type to Vray shadow. Easy as that

[Ray]

I've used ies lights with vray free (set with vray shadows) but I've had to crank up the multiplier of the lights 200-300 % to get any decent lighting. Is this just a limitation of the 'free' version?

[Craig Ramsay]

I have never used Vray free but I wouldnt have thought so.

 

Remember IES lights are photometric so you need to model in "real world" units for IES lights to work properly.

 

Craig

[Ray]

I always model in real world units.

 

Same subject, different question:

If I were to purchase vray advanced, would I be able to use it at work AND at home, or how does the licensing work?

 

TIA.

[Jim Mann]

Its an exposure type issue. I don't know about other versions but in Vray advanced you can increase the exposure (brighten the image) in the G-Buffer section of the rendering controls. You get a choice of linear, exponential and HSV exponential. I would recommend using either of the exponential varieties and to not be too shy of going with a high value...I am going from memory here.

 

Jim

[v_wrangler]

Hi Guys,

 

 

 

I know lot of you guys here uses Vray, Well Im new to it. I Hope you can help me with this. I have attached a test render using two different kinds of lightings, one common renderer which is Vray and common rendering settings.

The darker image is rendered using ies lights while the other image I use

Vray lighting. My question is, is it possible for me use the ies lights with

Vray? since ies lights are more accurate because lighting values comes from

the manufacturers and as per light specifications. So how can I adapt the

ies in Vray? Coz otherwise I'll end up again to radiosity.

 

Hello,

 

Vray light multipliers are different from that of an IES. It is also using inverse

decay by default. There is no numeriacal value to match that of IES with

VrayLights. You would have to do it by eye.

 

In the same way, you can use the ies lights in vray just like you would in

the scanline. IES works in VRAY. If you need to produce shadows, make sure

you set it to vrayshadows...

 

Regards,

 

vertex

[v_wrangler]

I always model in real world units.

 

Same subject, different question:

If I were to purchase vray advanced, would I be able to use it at work AND at home, or how does the licensing work?

 

TIA.

 

Raymond,

 

The license scheme has changed since 1.45XXX, right now Vray uses a

Licence Server application installed in any machine with or without MAX

installed. All max workstations that can access that machine via a LAN

connection can fire up VRAY. The number of vray licenses available

for use is also determined by the License Server.

 

Prior to 1.45XXX, all licenses were tied up to your max license, so if you

have a plud license at home, you are also able to import the same vray

authorization. I would suggest asking the guys at chaosgroup - they're

pretty accomodating.

 

Goodluck with Vray.

 

vertex