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Ugly low-poly with ambient occlusion

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Michael Tritsmans
Ugly low-poly with ambient occlusion
on Mar 16, 2016 at 11:02:25 am

Hello

Im very new to C4D, and probably have a newbie question:

I'm currently testing the clay/cartoon style render with some basic models. A first test can be seen here:
test.jpg

The tree in front, with the swing, gets some very strange dark adges on every polygon when rendering with ambient occlusion on.
Does anyone have an idea how i can get the cleaner?

Thanks in advance


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Michael Szalapski
Re: Ugly low-poly with ambient occlusion
on Mar 17, 2016 at 3:08:30 pm

Could you also share an image with your mesh showing?

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Michael Tritsmans
Re: Ugly low-poly with ambient occlusion
on Mar 17, 2016 at 5:36:29 pm

of course :)



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Michael Tritsmans
Re: Ugly low-poly with ambient occlusion
on Mar 17, 2016 at 5:35:58 pm

Ok, something weird happened with the link.

Second try:


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Michael Szalapski
Re: Ugly low-poly with ambient occlusion
on Mar 17, 2016 at 8:07:11 pm

You really need to fix your polys. They can't be twisted like that.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Michael Tritsmans
Re: Ugly low-poly with ambient occlusion
on Mar 18, 2016 at 11:11:40 am

Thanks for the advice.

Although I don't see what's wrong... Polygons can be parallelograms, right?

The tree will look entirely different if I'd use straight lines ...

Could you please be a little more elaborate as to how I can best fix this?

Thanks!


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Brian Jones
Re: Ugly low-poly with ambient occlusion
on Mar 18, 2016 at 2:15:23 pm

can we see an image with the AO artifacts you are talking about?


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Michael Tritsmans
Re: Ugly low-poly with ambient occlusion
on Mar 18, 2016 at 2:52:53 pm

Here a closeup of the render. You can see the strange dark borders on every polygon.



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Brian Jones
Re: Ugly low-poly with ambient occlusion
on Mar 20, 2016 at 12:30:10 am

on the trunk of the tree not the 'leaves'... In testing if you twist polys they show borders with AO - the only way to cure it (I have seen) is to add a SubD surface but that would change the look you have. Seems to be just part of what AO does (how it works) but it's also true of shadows in lights, you can make the shadows soft enough to eliminate it but they're so soft it won't look right - GI is similarly affected. If the look you are going for involves the twisted texture on the trunks I would do the twisting in the material and not in the trunk if you need to use AO.
Your twisting is fairly gentle compared to some of the testing I was doing so maybe you could do it with pure GI (which AO is a faster/less real fake for).


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Michael Tritsmans
Re: Ugly low-poly with ambient occlusion
on Mar 21, 2016 at 8:24:23 am

Thanks for your elaborate explanation.
It's actually the combination of AO en GI that gives me the look i want to achieve.

Subdivision surface might indeed be the best way to go... it indeed changes the look, but keeps close enough for what to achieve at this moment.

Thanks!


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