Practice: Complex AO Study
Practice: Complex AO Study
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The Shading Course – Fundamentals of Realism, Light & Shadow

Module 2 - How to See Light Effects

Practice: Complex AO Study

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Practice: Complex AO Study

2.8K
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Bradley Forbush
It took me a while to get to this exercise so I did a couple of extra views. I thought the airplane would be fun to do, but the top view became more of a rendering exercise because of its flat silhouette. Anyway - it was tempting to add half tone to the plane sketches to bring out some form, but I pulled back (even erased) in hopes of concentrating on AO.
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Chris Bodary
Complex AO study monkey head
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Chris Bodary
Complex AO study fish in graphite
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squeen
In ambient occlusion the question to ask your self is what fraction of the light in the hemisphere above a surface's normal can see light (and remembering that the flux of incoming light drops off with the cosine of the angle---so light from grazing directions is not as important). With AO we often imagine the entire sky is lit with ambient light, but that's a simplification. I think your fish may be a bit too shadowed. All in all, great progress!
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selenitis
After checking the solution for the monkey, I went back and had another go and tried to pinpoint where I felt like I was consistently making mistakes (not going dark enough, giving the AO too much of a direction, etc)
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Jeremy Rogers
Continuing to attempt ambient occlusion- first by attempting the demo video and doing two of my own in graphite. Feedback always appreciated.
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Thieum
Good job! This ambient occlusion work makes well feel the volumes.
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ivat
2mo
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David Zackiewicz
This is very hard, but I’m okay with the results. I'd hugely appreciate constructive feedback for the homework. Thanks :)
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Dorian Iten
Good work!! You are definitely getting the hang of this. Here are a few suggestions on the mug. The other two look solid!
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Jeremy Rogers
this one was fun!
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Sharntel Davey
Great assignment, thanks!
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flugmodus1
Struggled with the forehead of the monkey.
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Carl de Jager
Nice work on the monkey. Can I suggest some changes on the fish?
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Katelyn Brown
Just used the provided image and did a paint-over.
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Henri Gerrits
Nice assignment. When I took the photo of my drawing I thought maybe I printed the reference too small.
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Laura Barr
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Carl de Jager
Hi Laura. Remember that the direction of the direct light does not matter for ambient occlusion. Its all about surfaces getting closer to one another. So In (A) and (B) I've added some shading to show this for the nose and one of the eyes. Using the same logic, as the cheekbone gets closer to the arch of the upper teeth (C) I would also expect to see some ambient occlusion. In (D) I've added some shading to show how the cavity of the mouth gets darker the deeper we go. I would suggest having a look at the solution in the 'downloads' section and compare it to yours, section by section. Make sure that in each case you understand why the ambient occlusion shadow is getting darker.
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Félicia Gagnon
I haven't checked the solution yet, but here's what I was able to come up with, while imposing myself a time limit of 1 hour and 30 minutes.
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gasyadocro
Whoa, My brain over heated😵 But, as I watch the solution and other my own research, AO is interesting, and fun(when it goes right lol).can’t believe I have ignored such important factor.
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Carl de Jager
Nice work, Gasy.
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Brayden Copley
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Tony Vu
I tried the fish model. I still need a lot more practice with AO
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Carl de Jager
Hi Tony. A few points to look out for: Think of the top fin (A) as a flat plane. The closer it gets to the body, the less ambient light both surfaces will receive. The same principle applies to the dorsal fins of the fish (C). The spine of the fish (B) does not protrude from the body. Nor is it a cavity. So it will not feature too much in the ambient occlusion study.
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Jean-François (Jeff) Durix
it seems, you considered the spine of the fish is protruding our of the cut while I thought it was more of a small cavity, no?
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Jean-François (Jeff) Durix
Here’s my rendering attempt of ambient light and ambient occlusion on the monkey model
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Jean-François (Jeff) Durix
Just looked at the solution and discovered I had completely misinterpreted the model :-/
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