Practice: ModFac Hunting
Practice: ModFac Hunting
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The Shading Course – Fundamentals of Realism, Light & Shadow

Module 2 - How to See Light Effects

Practice: ModFac Hunting

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Practice: ModFac Hunting

2.8K
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orcamain
I think I was the most confused about the cast shadow on the form itself as well as the highlights but I'm sure I've made many more mistakes. Some critique would be very much cherished, thank you.
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Bradley Forbush
I did the exercise in photoshop with a mouse, not a stylus. I found the lesson more challenging than I thought it would be, due to the complex shape of the monkey’s head and so I spent a lot of time with it. I made several changes as I went through it. In particular, I kept changing the shadow under the monkey’s brow, —from form shadow initially, to cast shadow, but settled on dark halftone; the reason being it was in the light family. Another thought was whether to include the ear on the right as a form shadow or cast shadow, or both.  I also had some thinking to do about the center light.  Because of the modeled surface there were some parts that seemed to be receiving center light, like the monkey’s eye on the right, even though it was surrounded by half-tone. And I wasn’t sure how broad to define the ambient occlusion. So I would really appreciate some feedback on this assignment. 
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Dorian Iten
You did very well, @Bradley Forbush 👍 A few thoughts: - The shadow on the ear on our right is a cast shadow caused by the head, so the edge of that shadow is a penumbra rather than a terminator. - I tend to expand the Ambient Occlusion to a wider surface area because in shading, AO is such a useful device for creating form inside shadow areas. I've uploaded a solution image at https://www.proko.com/course-lesson/practice-modfac-hunting/downloads
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Chris Bodary
I’m excited to check the “module 2 feedback”. Video and hopefully get all the corrections because I dont’t feel confident this is correct. Would appreciate any feedback on this assignment from anyone. I can tell this is a weakness for me at the moment, can’t wait to get a hang of identifying these factors well!
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Chris Bodary
@Dorian Iten This already makes more sense, and after some thought and doing it again I feel much more confident with my 2nd attempt and the reasons why I chose to label things the way I did. But I still have some questions . I think I’m gathering that this is a bit of a balance of using what you see (or think you see) and using your brain and thinking, “well if this surface may appear similar value, but knowing there is 1 light source and the angle of it compared to this other plane, they both can’t be center light.” Based on your assignment reviews there doesn’t seem to be 1 absolute correct view but that there is room for artist interpretation. I understand that in creating we group things together on purpose and make design choices, I am just curious if it is more exact than that or not. For instance, is the “solution mod factor” file you posted the closest to true or is there slight argument for some of the subtleties? I apologize for the wordiness and Thank you. I feel like I am finding weaknesses in my drawing already!
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Kwame Alexander
This was tough.
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alcyonair
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ivat
2mo
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selenitis
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Carl de Jager
Hi guys. It seems that there are 2 modelling factors that people find more challenging: (a) the core shadow and (b) ambient occlusion. I'm posting a solution for those two modelling factors for you to consider. As far as the core shadow is concerned, it might be useful to think about it in the following way: if you take the shape of the form shadow and subtract the shape of the reflected light, you are left with the core shadow. Many of you correctly identified ambient occlusion where the monkey head touches the table / surface, but missed it in some other important places. Remember to look for it in cavities, tight corners, gaps and creases, like those found between eye balls sockets.
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William Thorn
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Carl de Jager
Good effort, William. The resolution of the image you uploaded is a little low so I couldn't clearly see your solution. Best to upload a high-res version next time. From what I can make out, it seems you may have misunderstood what the core shadow is. The core shadow is the part of the form shadow that is not receiving reflected light. So if you take the shape of the form shadow and subtract the shape of the reflected light, you are left with the core shadow. Your correctly identified ambient occlusion where the monkey head touches the table / surface, but have you perhaps missed it in other places? Think especially about gaps and creases, like those found between eye balls sockets.
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Sharntel Davey
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Carl de Jager
Fantastic work, Sharntel!
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flugmodus1
Hard one :-)
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Carl de Jager
Nice. Remember that the core shadow is the form shadow minus the reflected light. The terminator is therefore a good starting point when you are thinking about the core shadow. The terminator forms a large part of the border of the core shadow.
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Jeremy Rogers
my submission!
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Antonio Musella
This is mine, thanks
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Carl de Jager
Thanks Antonio. Something to remember about halftones is that you will always find them in the country of light (form light) and never in the shadows. The lighter values that you see in the form shadow are examples of reflected light. A good place to look for dark halftones is in the form light, close to the terminator. As far as the core shadow is concerned, it might be useful to think about it in the following way: if you take the shape of the form shadow and subtract the shape of the reflected light, you are left with the core shadow. Your correctly identified ambient occlusion where the monkey head touches the table / surface, but have you have missed it in some other important places. Think especially about cavities, tight corners, gaps and creases, like those found between eye balls sockets.
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Laura Barr
I used colored pencils.
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Carl de Jager
Hi Laura. I'd like to point your attention to the fact that there can be several areas on a form where we see the same modelling factor. Your solution is missing a few more places where we see the core shadow, centre light and highlight modelling factors.
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Katelyn Brown
I'm not sure that I have it all at 100%. Definitely have a lot to learn here....
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Carl de Jager
Nice work, Katelyn. Dark halftones are part of the light family, so you will never find them in the shadows, even if they appear just as dark as some of the tonal values found in the shadows. I would also add a few more specular highlights. When I look in the shadows of the monkey head, I can see the pattern of the floor reflected (specular). This tells me that we're not dealing with a completely matte surface.
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Henri Gerrits
So, this was a tough but nice exercise. I would like to hear comments on what is right or wrong.
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Carl de Jager
You did a really good job, Henri. You're right about a cast shadow on the ear! In your solution for reflected light, the small light shape you mention is part of the form light.
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Félicia Gagnon
I decided to go with sharp edges, in order to focus more on identifying the extent of the different areas than on blending them together. I feel like I got confused in a few different places, partly because the object seems to be a bit reflective, like porcelain. I might have made things more complicated than they needed to be, and I might have imagined some subtle nuances here and there. Still, that was a fun exercise!
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Carl de Jager
You did great, Félicia. There is only one modelling factor that I'd like to clarify for you. Dark halftones are part of the light family. Therefore, you will find them in the form light, never in the shadows, even if they appear just as dark as some of the tonal values found in the shadows.
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Bartolome Ramis de Ayreflor
Nice exercise:)
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gasyadocro
This was mind blowing. I Ignored every detail of shadow until this assignment. Anyway, I submitted as I committed.Thanks.
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Tony Vu
Not 100% on my answers, but this is to the best of my current understanding
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