Anim8or Community

General Category => General Anim8or Forum => Topic started by: Chopper Al on July 21, 2009, 12:35:24 pm

Title: Question about Ambient Occlusion
Post by: Chopper Al on July 21, 2009, 12:35:24 pm

Hey folks,

I've gone through the on-line manual and have not been able to find anything regarding ambient occlusion in Anim8or.  I also tried searching through the forums, also with no luck.  I used to use Anim8or a couple of years ago, and was sure I could get this type of render, but just can't remember how to do it.

To show you what type of render I am talking about (in case Anim8or calls it something different), I am including some pics of model renders that I did in other software.

AO render that I did in C4D
(http://i291.photobucket.com/albums/ll293/Chopper_Al/Eagle.jpg)

AO render that I did in Animation:Master
(http://i291.photobucket.com/albums/ll293/Chopper_Al/1934Ford1.jpg)

Thanks in advance...
Al

Title: Re: Question about Ambient Occlusion
Post by: floyd86 on July 21, 2009, 12:55:50 pm

AO is possible in anim8or yes. But it's a bit trickier then in C4D or any other application.
Follow these steps:

• First, if you want a typical grey AO render (like the first image you showed), give all the objects in your scene a grey material with a specular value of 0
• Go to scene mode (all object in this scene should be grey right now).
• Go Scene> Attributes and create a new attribute called 'AmbientOccluder' and give it a int value of 1.
• Now go to Settings> Lighting and set the global to 0 and the ambient to 3.14 (you might want to tweak this settings till they fit you)
• Now set the renderer to ART and the AA value to atleast 64, or higher. Or else you will get a grainy render.

SHould give you something like the image I added:

I hope this helps.
More info here: http://anim8or.com/download/preview/index.html

Title: Re: Question about Ambient Occlusion
Post by: Chopper Al on July 21, 2009, 01:15:21 pm

Thank you very much floyd86.

I had just Googled 'Anim8or Ambient Occlusion', and found where Steve had posted a topic showing the Ambient Occluder.  Your step-by-step instructions and the project file Steve provided helped quite a bit.

A lot of Anim8or is still the same, but other features like this are really great!

Anyway, great to be back, and look forward to doing some modelling in Anim8or again.

Al

Title: Re: Question about Ambient Occlusion
Post by: Arik_the_Red on July 22, 2009, 01:37:48 am

What exactly does one look for and say, "Yes, I see 'ambient occlusion' in that render" ?

Title: Re: Question about Ambient Occlusion
Post by: floyd86 on July 22, 2009, 07:23:19 am

Ambient Occlusion is shading technic in which it looks like there isn't one light source but the light is coming from every where: so called global illumination (GI). THis way the parts that lay more underneath and will recieve less light will be darker. And the parts on the outside will be lighter due the bigger amount of light that falls on it.