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Light Probes for environment lighting

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Chris Adler

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Light Probes for environment lighting

PostTue May 31, 2016 8:12 pm

I'm trying to find how to use an HDRI light probe with fusion to light 3D elements in a scene. I don't need reflection or refraction, just the scene lighting to be based on the environment map.

Help!
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Chad Capeland

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Re: Light Probes for environment lighting

PostTue May 31, 2016 8:19 pm

Place spotlights that match the environment map. Or write your own shader. Would it be enough to do the shadows with AO?
Chad Capeland
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Eric Westphal

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Re: Light Probes for environment lighting

PostTue May 31, 2016 8:21 pm

Hey Chad.

Seems as if your shader-writing-capabilities could be of some really helpful use here...:-)
my hovercraft is full of eels.
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Chris Adler

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 12:06 am

So this functionality doesn't exist in Fusion? That kinda boggles my mind. Every 3D app does it. Nuke does it. Arg!!
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Pieter Van Houte

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 2:16 am

Are you talking about environment lights in Nuke? That's just a spherical reflection map, not actual lighting. You can do that easily in Fusion with the Reflect material.
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Chris Adler

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 2:36 am

I'm referring to the environment light node in Nuke that can take an HDRI map and use that to light the scene. Not just reflections.
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Pieter Van Houte

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 2:39 am

That's the one I mean. You can only use it with reflective surfaces. That should give you a hint as to what it actually does. :)
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Chad Capeland

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 3:08 am

I have a specular convolution shader that can take a cubemap or spheremap and make a Lambertian (or a custom BRDF) "bake" of the lighting using Fusion UV Renderer. But if you wanted to try it on your own, we have the tool for that too.
Chad Capeland
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Eric Westphal

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 5:43 am

But using the UV-Renderer means that one has to do this for each object in the scene individually, right?
Plus, baking isn't too dynamic with moving objects, unless you bake every frame...:-)
So, yeah, a real HDR-Lighting tool would be swell indeed!
my hovercraft is full of eels.
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Salvo Triolo

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 8:20 am

I think a third part render engine could resolve this and other tons of material/light issues for this comp software. We need a confortable jump ahead in this and other fronts and third parts are welcome...a BMD faster development more than welcome :)
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michael vorberg

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 9:33 am

There is a script that can create a light array from an image, that can be used to light the scene with color from the image
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michael vorberg

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 9:39 am

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Chad Capeland

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Re: Light Probes for environment lighting

PostWed Jun 01, 2016 12:37 pm

Eric Westphal wrote:But using the UV-Renderer means that one has to do this for each object in the scene individually, right?
Plus, baking isn't too dynamic with moving objects, unless you bake every frame...:-)
So, yeah, a real HDR-Lighting tool would be swell indeed!


You don't have to bake, no. But you said light probe, which implies baking.
Chad Capeland
Indicated, LLC
www.floweffects.com

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