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Fast Ambient Occlusion in 3ds Max

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(21 Votes)
| Comments 12
Date Added: 16th November 2010
Software used:

Keep playing around with the values to get the quality you need. Add higher samples value to reduce grain, just keep in mind this increases render time. (Increase to 32, 64 or even 128). When you're happy with the result save the image and open it in Photoshop.

Step 3: Add AO Layer in Photoshop

To avoid the Ambient occlusion layer darkening your image in general, you might want to adjust the image levels (Ctrl + L) before you apply it to your picture. A quick auto adjust should do the trick (Fig.09).

Fig. 09

Now all you have to do is to drag the Ambient Occlution Layer on top of your final render and choose Multiply. And voilà, you have Ambient Occlusion that was super quick to render with the added advantage of being easy to tweak and adjust (Fig.10).

Fig. 10

The final result can be seen in Fig.11.

Fig. 11

And for comparison, the render before Ambient Occlusion layer was applied (Fig.12).

Thanks for reading!

Fig. 12

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Readers Comments (Newest on Top)
Mario on Wed, 16 December 2015 3:13pm
Thanks for the tutorial! I've been struggling getting a realistic look to my renderings and this is a really quick and easy way to spice up the render. Even though the occlusion isn't "accurate", it's great and really fast, especially since i'm rendering a 1500 frame animation and splitting it up helps it not take too long. Thanks again!
Ariespranata on Tue, 11 November 2014 3:16am
Hi, this is a very nice tutorial. Btw, I've spent a little time and creating a script that will do exactly the same as what you're doing in this tutorial. Take a look: Nice thing about this script is, when you run the script, it will render the AO pass and leave your scene as if nothing happened. :)
Anoop Eapen on Tue, 28 October 2014 2:55pm
Dear, pls give the 3ds max system requirement pls send me
Aily on Fri, 21 February 2014 7:06am
You can use mr AO shader on standart Omni light, but in it "advanced" rollout enable "ambient only" flag. And now any materials (not only mr) will be with AO. And you don't need photoshop anymore for this ;)
Mick on Sun, 24 November 2013 8:41pm
Great...thanks for this.
David on Fri, 22 November 2013 12:10pm
This is great to follow up for a quick 'render to texture', nothing wrong with it at all, even though it isn't 'physically accurate' and all that rubbish.
Martin on Thu, 03 October 2013 12:15pm
Thank you for making this tutorial. I know it was not supposed to be a 100% accurate AO map, but it is absolutely perfect for a very quick way to get very nice results for quick proofing renders. Cheers Martin
Merey on Sat, 22 June 2013 9:35pm
nice but how do you handle a;pha maps like leaves with this technique?pls if you know tell me: tanx
Grant Salisbury on Mon, 28 January 2013 2:13am
A great way to do this quickly is to use this script. Quick Passes Great for quick mattes and lighting as well as ao passes.
Tim on Sun, 09 January 2011 11:00pm
also, you can disable final gather for your ambient occlusion pass, makes it at least slightly faster.
Tom Isaksen on Wed, 17 November 2010 10:05am
Actually Vladimir, the point is to make it easy and quick, particular if you NOT just using Arch & Design shaders.. But you are right, it's not a physically correct Ambient Occlusion effect, and I suppose I could have stressed that more in the tutorial. So thanks for pointing it out.
Vladimir Jankijevic on Tue, 16 November 2010 9:22pm
I'm sorry but if you've read that post by Master Zap, you'll see that your technique isn't quiet right and is missing the point of ambient occlusion. here is the link to the post:
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