Self Glow affecting other objects ?

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Permalink Reply by Render Plus on April 19, 2011 at 7:05am

Even if the glow does not directly light other objects, changing it with lighting channels is going to cause Photometrics to effect the overall image. (If the screen gets brighter, then everything else will get dimmer to compensate)

 

I think Roy has added a feature to lock the Photometrics. I just looked for it in the nXtImage Editor, but I couldn't see it there. We have not added a way to turn it on in IRender nXt yet.

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Permalink Reply by Boothy on April 19, 2011 at 7:27am

That will be really useful

Thanks

 

Boothy

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Permalink Reply by Render Plus on April 19, 2011 at 2:34pm

This will give you something more to play with. Locking the Automatic Luminance can have some other unexpected effects, but it works well for self glow.

 

In this first image I have locked the Luminance, then lowered the lights and turned self glow off in order to get a somewhat dim scene.

 

Then, leaving Luminance locked I added self glow to the back panels. This gave me the desied effect of increasing the intensity of the panels, and their reflection in the mirror, without compensating by lowering the intensity of other objects.

 

 

Enjoy! - But use with care.

(And of course you have to wait for the release of the next version)

 

[Edit: Change Images]

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Permalink Reply by Boothy on April 19, 2011 at 3:09pm

Look forward to it - I presume the lock can be used in tone operator post render so I can always change easily if I muck up !

Thanks again for the quick response

 

Boothy

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Permalink Reply by Render Plus on April 19, 2011 at 3:24pm

Yes - locking only works properly after the first pass has rendered - since the initial value of Average Luminance needs to be calculated which rendering.

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Permalink Reply by Boothy on April 22, 2011 at 11:06am

Hi Al

I have just noticed you have included the `lock` into latest version - seems to work well - I think this will have many applications\advantages - I just have not thought of them yet !

Thanks again - usual top support service!

 

Boothy

 

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Permalink Reply by Render Plus on April 22, 2011 at 11:47am

Thanks Boothy - it works especially well when building up a scene starting the lighting channels at 0 and adding just the lights you want.

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