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UV Mapping Insights/Help
Posted: 14 August 2019 03:45 AM   [ Ignore ]  
Total Posts:  45
Joined  2017-11-07

Despite my truest of efforts, successfully UV mapping an object has eluded me. I thought I made a breakthrough today after learning how to separate different parts of an object into UV islands, only to have the resulting checkerboard texture reveal that the result was pretty bad.

I feel like I’ve watched so many thorough tutorials and read a lot of useful documentation on this subject, yet, I’m still unable to grasp what I feel like is that “missing piece”.

I’ve attached a project file of an object I’ve been trying to get UVd correctly in hopes that someone would be willing to walk me through whatever steps or concepts it is that I seem to be lacking.

This is the one area of 3D that has been the most frustrating and perplexing to learn. I believe in myself and my ability to learn, yet, this portion of design makes me feel like I’m only operating with a quarter of a brain.

Any help would be EXTREMELY appreciated!

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Cork Hat_Cineversity.zip  (File Size: 132KB - Downloads: 6)
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Posted: 14 August 2019 07:18 AM   [ Ignore ]   [ # 1 ]  
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Hi helloimneil.

Please check your private message here in Cineversity. I have sent you an upload link since the attachment system here in the forum is buggy. Sorry about the extra work.

I will do my best to walk you through the steps, and please ask as long as needed afterward, it might help some other people as well.

Talk to you soon.

Cheers

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
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Posted: 14 August 2019 09:04 AM   [ Ignore ]   [ # 2 ]  
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Thanks for the file, helloimneil, very much appreciated.

I guess I tell you nothing new, but somewhere we need to compare our ideas about it. So we get it in the way you want.

Here is your file back.
https://www.amazon.com/clouddrive/share/KjBiXOTCqQeg1un06gn9NQuLLSU8ty7kQzzt5pfsaUj
Please let me know what you don’t like about it. I have mostly adjusted the vertical parts. If that is how it should look like, then I will record a screen capture how to do it. If it isn’t what you were looking at, then please advice. My idea here is a material that is kind of like paper, (sort of the opposite of rubber). So, if I had to cut this out of a non-elastic material, this seems to be the result.
Cork Hat: (Fair use image, not for any other use)
https://www.amazon.com/clouddrive/share/w5TdPfDuhecTeJiL0aT0yEf64mYksEx18R5aigwBgap

Hats are also created out of felt, whereby steam is used to shape it in any form. Which means the texture would look different, but since felt has no real indicator where it was stretched a little bit, we would assume an even distribution of texture. Given a checkerboard pattern, this would be difficult to keep un-distorted.

Let me know what your ideas are, I’m happy to look into it.

Cheers

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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Posted: 14 August 2019 09:09 AM   [ Ignore ]   [ # 3 ]  
Total Posts:  45
Joined  2017-11-07

Dr Sassi,

First, thank you immensely for taking a look at my project file and making the augmentations you did. Your result is definitely much cleaner than what I had achieved previously.

In comparing the UV edits, it looks like the main major change that’s present is the top piece in the UV editor, I’m curious as to what steps you took to achieve that result as the resulting grid spacing you achieved is consistent around the band, as opposed to what I had created previously.

Again, thank you for your time and dedication to the members of Cinversity!

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Posted: 14 August 2019 09:20 AM   [ Ignore ]   [ # 4 ]  
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Actually, I’m curious about the whole process, to be honest. Not just the aspect of the UV mapping that I mentioned in my previous post. I recognize the sheer necessity of understanding UV mapping, though, I seem unable to grasp even the more rudimentary concepts and methods concerning it.

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Posted: 14 August 2019 09:37 AM   [ Ignore ]   [ # 5 ]  
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You’re very welcome, helloimneil, thanks for the reply.

Here is the part that I have done with the supplied model:

Screen capture:
https://www.amazon.com/clouddrive/share/kJ5IKO8k3P80t83CsBHsi1kHsLRgerNYKtjvpt20822

There are other ways to do it.

I will prepare a file, that I generally use during Hands-On classes, and that little drill takes on an average a few minutes but hasn’t failed so far to get the “mechanic” of UV. It doesn’t provide the knowledge of all the tools, of course, but that would be a one or two day course to really bring home.

Enjoy.

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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Posted: 14 August 2019 09:39 AM   [ Ignore ]   [ # 6 ]  
Total Posts:  45
Joined  2017-11-07

Thanks! I’ll watch this screen capture now.

Are there any courses you’d recommend, paid or free, that really hammer home the core concepts of UV mapping with Cinema?

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Posted: 14 August 2019 09:46 AM   [ Ignore ]   [ # 7 ]  
Total Posts:  45
Joined  2017-11-07

Your screen capture conveyed quite a bit! That’s a very handy technique you’ve shared, I will definitely utilize this in the future!

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Posted: 14 August 2019 09:51 AM   [ Ignore ]   [ # 8 ]  
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Helloimneil,

For the model, we have X, Y, Z

For the textures, we have U, V, W. (Mostly UV, when we talk about textures, UVW when 3D shader are in use)

Simplified: The same points, different names.


The main idea is, UV is a representation of the polygons of the object, peeled like an orange peel, and flattened out. Think of a four-sided object polygon as the surface that should receive a section of the image (texture), the UV polygon is then like a frame on that texture, to specify what do you want from that image to be on your model. This is all. Anything else are management tools to get a particular result for any framing. The framing of uncounted frames; sometimes, there is the challenge.

Here are some tutorials to check out. I have no idea where it clicks, and you got it, but just let them run and enjoy:

https://www.cineversity.com/vidplaytut/boston_terrier_illustration_creating_uv_map_unwrap_uv_toolset_bodypaint_3d

https://www.cineversity.com/vidplaytut/boston_terrier_illustration_fixing_uv_map_after_mirroring_polygons_sculpt

https://www.cineversity.com/vidplaytut/create_initial_uvw_coordinates_quickly_with_set_from_projection

https://www.cineversity.com/vidplaytut/fix_broken_uv_coordinates_using_uv_terrace

https://www.cineversity.com/vidplaytut/new_in_cinema_4d_r19_uv_editing_workflow_user_interface_enhancements

Cheers

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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Posted: 14 August 2019 11:37 AM   [ Ignore ]   [ # 9 ]  
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This might be very basic, but it had worked so far in any class over the past decade when UV was requested to learn. Typically I use the companies logo to create, here of course I use the C!

Again, I know it looks simple, but it helps to establish the wires in the brain between the parts.

As usual, I don’t like to show off tricks, I want to share information, so the base is given to really grow.
As I get not tired to say, the expression “I know that” is the biggest stopper in pretty much anything. So, I hope I have cleaned out any resistance. wink

Here are the files, a screen-capture (can be downloaded) and a psd file. Anything else is up to you.
https://www.amazon.com/clouddrive/share/1YX7hztE6Rg5cuHaG9Y7RuLqhH6dgL0bj7bf5Is3R7n

Enjoy

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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Posted: 19 August 2019 02:06 PM   [ Ignore ]   [ # 10 ]  
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P.S.:
https://www.cineversity.com/vidplaytut/how_to_uv_unwrap_and_relax_a_humanoid_character

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Dr. Sassi V. Sassmannshausen Ph.D.
Cinema 4D Mentor since 2004
Maxon Master Trainer, VES, DCS

Photography For C4D Artists: 200 Free Tutorials.
https://www.youtube.com/user/DrSassiLA/playlists

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