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Hi, has anyone ever tried doing lens effects in an unbiased renderer? Last week I tried simulating chromatic aberration by building a lens and setting the new spectral dispersion attribute... it didn't really come out right, most of the colors were intact except around the very edges of the lens itself.

Looks like Maxwell Render 1.0 could do glare, but all the info about it is very old and all the images are broken links

colorlabs wrote:I tried simulating chromatic aberration by building a lens and setting the new spectral dispersion attribute...

How can you build a lens? Could you elaborate?

Maxwell indeed did glare and dispersion, i don't know how "physically accurate" that was though. It looked fine.

Here is a tip to making great looking dispersion effect, by Master Zap.
The part you're looking for is almost at the end of this post:
http://mentalraytips.blogspot.com/2009/ ... s-and.html

It requires three or more renders, but should be possible to achieve in every raytracer and in an unbiased renderer as well.

Hi jamnique, I'm not talking about dispersion for gems and crystals, Octane 2.48 already does that. I'm talking about chromatic aberration in the output image, like a photo taken by a camera with a crappy lens. There are AE plugins for this, but I thought it might be neat to do it within Octane, simulating the dispersion in a real camera lens.

colorlabs wrote:Hi jamnique, I'm not talking about dispersion for gems and crystals, Octane 2.48 already does that. I'm talking about chromatic aberration in the output image, like a photo taken by a camera with a crappy lens. There are AE plugins for this, but I thought it might be neat to do it within Octane, simulating the dispersion in a real camera lens.

It's ironic.I spent an absolute fortune on a decent lens for my camera to get rid of this effect.Well that and then tuning the photos up in Adobe Camera raw.

Now your trying to re-create it in octane...

so that you can remove it in Photoshop?



Only joking.

Jaberwocky wrote:

colorlabs wrote:Hi jamnique, I'm not talking about dispersion for gems and crystals, Octane 2.48 already does that. I'm talking about chromatic aberration in the output image, like a photo taken by a camera with a crappy lens. There are AE plugins for this, but I thought it might be neat to do it within Octane, simulating the dispersion in a real camera lens.

It's ironic.I spent an absolute fortune on a decent lens for my camera to get rid of this effect.Well that and then tuning the photos up in Adobe Camera raw.

Now your trying to re-create it in octane...

so that you can remove it in Photoshop?



Only joking.

Hehe it's the same with vignetting in photography Spend a ton of money to get rid of it, and then... REINTRODUCE IT IN POST!
Anyways, i didn't know Octane already did diamonds' dispersion. I guess chromatic aberration will come with custom bokeh maps. Then you can plug something like this, and get something like that:

Another feature that I would like to see in octane would be bokeh DOF effect for camera that would be awesome.

From what i remember it's coming as a 1.x feature. And then you will be probably able to do what i posted above. If custom bokeh maps will be supported.