How accurate is the daylight system in VIZ?

[Mr Cory]

Just a quick question, not sure if this is the right place but anywho...

The daylight system in VIZr, how accurate is it? Im trying to give the client an idea of the shading that their new house will cause

[Steve_Bennett]

Just a quick question, not sure if this is the right place but anywho...

The daylight system in VIZr, how accurate is it? Im trying to give the client an idea of the shading that their new house will cause

It is extremely accurate. Built with data from IES, it can be used in CSI forensics or generating shadow studies for billion dollar projects - you name its been done.

[Mr Cory]

Impressive, so i should be trusting vizr over what i find on sites on the net?

[Steve_Bennett]

Impressive, so i should be trusting vizr over what i find on sites on the net?

What you you mean by "what i find on sites on the net?" - are you finding info contrary?

[dellis]

It is a correct system in so far as it tracks the correct angle and movement of the sun. So yes you can do shadow studies and they will be correct. Be sure to set the compass rose to the north direction in your scene.

[Mr Cory]

Yea the times of sunset and rise are a little out according to these web sites. Unless i was doing something wrong, they were out by 30min or so at the most
http://www.gaisma.com/en/location/invercargill.html
http://www.timeanddate.com/worldcloc...omy.html?n=510

[Steve_Bennett]

Yea the times of sunset and rise are a little out according to these web sites. Unless i was doing something wrong, they were out by 30min or so at the most
http://www.gaisma.com/en/location/invercargill.html
http://www.timeanddate.com/worldcloc...omy.html?n=510

What is the elevation of your model in MAX? does it match the real world elevation of your site?

[Mr Cory]

Hmm there a good point, didnt think of that, the model would be at 0 i guess, but even so i think we are only 50ft or so above sea level, i wouldnt of thought it out have made that much difference

[Steve_Bennett]

Hmm there a good point, didnt think of that, the model would be at 0 i guess, but even so i think we are only 50ft or so above sea level, i wouldnt of thought it out have made that much difference

Lens size / focal length can also affect appearent sun location relative to the horizon.

[Mr Cory]

Huh, ands heres me thinking i was getting the hang of VIZ... Sigh owell. Why would the lens etc effect it?