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xebajac@zdfpost.net xebajac@zdfpost.net avatar image

When will Arnold add bloom and glare lens effects for lights-Post FX??

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Aaron Ross avatar image
Aaron Ross answered

My guess would be "never". This would be a great feature, but it's not a "physical" effect, so it doesn't fall into the religious canon of things that Arnold devs want to deal with. I anticipate that the response you'll get, if any, is "fix it in post". But I'd love to be proven wrong.

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Man i love your response haha...but lets see if you can be proven wrong

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BRUNO PO avatar image
BRUNO PO answered

Actually, glare can be implemented in a physical way, simulating lens scattering, lens data, etc. Like zoic and pota lens shader for arnold that you can get for free.
You can actually get "bloom" in arnold using volumes, as this effect is usually due to the medium your light is in, like so:

without the volume:


bloom.jpg (163.5 KiB)
nobloom.jpg (44.7 KiB)
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Thanks but wouldnt it be better if we had a dedicated option for arnold

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Those glare presets you mentioned dont work in cinema4d

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You will need either a physical volume, or put an atmosphere volume in the environment, use a high anisotropy to keep It closer to the light source. You Will need a physical volume If you want indirect light to affect it though. There is no "bloom preset" you are just simulating particles in the air.

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About pota and zoic, they are not presets, they are camera shaders, after installing It in the Arnold folder or following its install instruction It should work in any host app, but I am not sure. You use It by changing the camera from perspective to pota. I dont think zoic works with Arnold 5, just 4. Either way they do not simulate Bloom, but other effects like chromatic aberration, bokeh and vignette

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Aaron Ross avatar image
Aaron Ross answered

Volume rendering is super expensive. A non-physical solution will render WAY more quickly.

Thanks for the tip about ZOIC and POTA. But now the question becomes, when will MaxToA support camera shaders?

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Not really, atmosphere volume is really cheap, albeit only works with light sources. So no "bloom" from specular highlights for example.

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Aaron Ross avatar image
Aaron Ross answered

@Zeno Pelgrims is there a way to install the POTA camera shader so it will show up in 3ds Max? I added the .dll to the Arnold plugin path, and was hoping that it would show up as a camera type in the Create panel, but no. And the Attribute Editor template file is irrelevant to 3ds Max, right? It's only for Maya.

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In maya its neither a "shader" nor a dedicated camera, its an attribute in the camera itself.
How do you change your camera in Max for spherical camera, fish eye, vr, etc?
This is where you change to pota in Maya.

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pota.jpg (131.8 KiB)

Thanks, Bruno, I know how to choose the camera type in Maya. But 3ds Max is completely different. Each flavor of Arnold camera is a different primitive. After installing the .dll in the arnold plugins path, I was hoping to see a new primitive listed in the create panel, but it's not there.

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A translator for the Arnold Plugin needs to be made to expose it in MAxToA : https://docs.arnoldrenderer.com/x/w4JsAg

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xebajac@zdfpost.net xebajac@zdfpost.net avatar image
xebajac@zdfpost.net xebajac@zdfpost.net answered

But i'm using arnold 5 i can't downgrade...solidangle should develop theirs,like octane

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Doug Addy avatar image
Doug Addy answered

lens bloom is caused by a lens artifact not by volumetrics.

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Thiago Ize avatar image
Thiago Ize answered
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