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Author Topic: Lighting  (Read 10685 times)

Kevin Gales

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Lighting
« on: January 24, 2022, 06:41:35 am »
I am back after a few months of a coding contract...Apparently it had something to do with 3d physics...Anyway so I found this render and decided to recreate in anim8or boy it proves a challenge I have tried people I am struggling to make this look almost the same...
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Steve

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Re: Lighting
« Reply #1 on: January 25, 2022, 06:49:42 pm »
Anim8or doesn't support photon mapping or path tracing in the Art renderer, so it cannot model the diffuse reflections that are required for images like this.
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Kevin Gales

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Re: Lighting
« Reply #2 on: January 26, 2022, 02:31:31 am »
Thanks @Steve...I was scratching my head for a while..now it is clear.... 8)
« Last Edit: January 26, 2022, 02:33:36 am by Kevin Gales »
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ENSONIQ5

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Re: Lighting
« Reply #3 on: January 26, 2022, 04:07:03 am »
Photon mapping can be simulated to some extent with some ART attributes (specular > glossy) and a few extra lights.  This scene took 10 minutes to model and about an hour of fiddling with light positions and attributes, with a bit more fiddling it would probably be possible to get closer to the original.  AN8 file attached.
« Last Edit: January 26, 2022, 04:10:06 am by ENSONIQ5 »
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Kevin Gales

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Re: Lighting
« Reply #4 on: January 26, 2022, 09:23:04 am »
@ENSONIQ5 What?! That's impressive I am guessing patience and a little bit of magic can do wonders..I am impressed that is way closer to the picture.Thanks man.
« Last Edit: January 26, 2022, 09:30:42 am by Kevin Gales »
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Kevin Gales

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Re: Lighting
« Reply #5 on: January 26, 2022, 09:56:41 am »
After Steve mentioned photon mapping I went on to inspect the original files.He is right there is photon mapping involved the project contains exposure filter(gamma corrector),photon mapping,soft shadows and ambient occlusion(opposed to monte carlo*I think this is used in anim8or) and finally the sphere have caustics enabled.
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ENSONIQ5

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Re: Lighting
« Reply #6 on: January 27, 2022, 12:49:32 am »
Cool, Anim8or can handle Ambient Occlusion via scene attributes and to be honest I totally forgot about that! It would have improved the output though using soft shadows and fiddling with light range/angle settings does go some way towards a similar effect.  I wasn't able to get anything like the original image with a single light source (which I presume the original image used, apart from some ambient lighting) but that may have a lot to do with the materials and how they interact with the light.  So my image is really a 'cheat' that uses a bunch of lights including one to fake the sphere's caustics.
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Kevin Gales

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Re: Lighting
« Reply #7 on: January 27, 2022, 03:13:59 am »
Quote from: ENSONIQ5 on January 27, 2022, 12:49:32 am
Cool, Anim8or can handle Ambient Occlusion via scene attributes and to be honest I totally forgot about that! It would have improved the output though using soft shadows and fiddling with light range/angle settings does go some way towards a similar effect.  I wasn't able to get anything like the original image with a single light source (which I presume the original image used, apart from some ambient lighting) but that may have a lot to do with the materials and how they interact with the light.  So my image is really a 'cheat' that uses a bunch of lights including one to fake the sphere's caustics.

But then your cheat totally works great. 8) After all for someone who isn't into physics and all this 3d development stuff would still accept the image as closest to real life lighting behavior especially if they did not see the original render first.Great stuff man

Perhaps Steve can point us to the AO feature.AO is quiet interesting if you ask me.I have seen some impressive stuff happen when I rendered with AO enabled. In some conditions it almost looks close to (Subsurface scattering * Very interesting stuff,would dramatically make scenes more appealing)
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