Rhino 3D CAD Technique #12: Difference between Unroll, Smash and Create UV Curve commands (有中文字幕)

This video tutorial explains the difference between Unroll, Smash and Create UV curve commands that often get confused. (有中文字幕)
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[@ahmedhameed2025]

Your presentation of lessons is very amazing .. In fact, I studied all design programs, and I have not seen such a method of teaching. Regardless of your professional design, you are a teaching legend. I love you

[@PJChenJewelryDesign]

You are very welcome, Ahmed. I have taught in the college for 15 years, and learn a lot from my experience to deliver material concise and accurate.

[@ahmedhameed2025]

Thank you, you are really amazing .. I am enjoying introducing you and learning from your experience.

[@rajendrameena150]

True teacher, even I don't think like that. You are very good teacher that know what is actually important.

[@PJChenJewelryDesign]

Thank you

[@vinay8467]

Thanks you so much sir . I was very confused about these options.

[@PJChenJewelryDesign]

Glad it is helpful!

[@vinay8467]

@@PJChenJewelryDesign sir can you please make one video on flow along the surface . I am facing some issues on it

[@maahtiti]

Very helpfull.thanks a lot

[@PJChenJewelryDesign]

Glad it was helpful!

[@ZianLu]

you explain it so deeply, thank you.

[@PJChenJewelryDesign]

You're very welcome

[@ptruong7819]

Your explanations are very clear, thank you

[@PJChenJewelryDesign]

Glad you think so!

[@martinpontbriand8048]

Thanks PJ

[@PJChenJewelryDesign]

You are welcome!

[@olegs9474]

Thank you for your effort, really like your way of teaching

[@PJChenJewelryDesign]

You are welcome. Stay tuned for more.

[@petertruong3195]

Very easy to understand your video

[@PJChenJewelryDesign]

Glad you like it !👍

[@edled1026]

Thank you for your valuable Videos

[@PJChenJewelryDesign]

You are very welcome. 😊

[@aliceycl]

感謝你的教學總是能直指痛點~而且還有繁中翻譯!!(後來才發現的大驚喜) 你是天使~~

[@PJChenJewelryDesign]

Yen Lai 太好了！

[@peter962592]

Thank you, i am watching each of your videos. There are amazing.

[@PJChenJewelryDesign]

Glad you like them!

[@emrahy.849]

Very useful details..thanks a lot again

[@123kkambiz]

Very important subjects. Thank you very much.

[@PJChenJewelryDesign]

You are very welcome!

[@hermanromberg2623]

Thank you for you wonderful explanation

[@PJChenJewelryDesign]

You are welcome! Let me know if you have any questions about Rhino 3D.

[@vahibatrie6945]

how can do with rhino this: kzbin.info/www/bejne/oaSYqmefi8pooqs . Thanks from now

[@PJChenJewelryDesign]

I will look into that and get back to you here. thanks.

[@unblutiger2020]

Thanks 🙏

[@PJChenJewelryDesign]

You’re welcome 😊

[@raavangaming2633]

I am practicing rhino it is very helpfull

[@PJChenJewelryDesign]

that is great!!

[@Davit.Movsisyan]

Hi. Isn't there any other way to flow along surface correctly using CreateUVCurve?

[@onelackfast1132]

Hi PJ A lots of thanks to share knowledge they are very helpful for me. really you go to deep .

[@PJChenJewelryDesign]

You are very welcome. glad you like my videos.

[@СергейШевченко-п7щ]

Спасибо лайк в продвижение канала

[@PJChenJewelryDesign]

Glad you like my video

[@estibalizherran9944]

omg you're amazing!!! I needed the surface to make it in a textile for a model, thank you.

[@PJChenJewelryDesign]

you are welcome. glad it helps!

[@jjustamann]

whats the best way you find to... which command?

[@datma9805]

thank you

[@PJChenJewelryDesign]

You're welcome

[@sisa6519]

Thank you . It was so helpful und easy to follow and understand. :D

[@PJChenJewelryDesign]

Glad it was helpful!

[@thomasratier5722]

Thanks! I'm also confused with unrollsrf UV and squish as someone already mentionned.

[@PJChenJewelryDesign]

Hi Thomas, There are commands that you can flatten a surface. Squish is one of it. The difference between those commands is the way of stretching and the % compression and expansion in some areas. None of them will be 100%. depends on the surface you want to flatten. some restriction may apply. for example. Unroll only apply on flat surfaces. and rest can be used on curve surface.

[@56hiyaprajapati88]

Hi sir, if used flow along surface, and we get option like rigit, if apply rigit yes then our circle ⭕ place is as it is our object, please currect me if I wrong.

[@EngineerAAJ]

nice video, what about the squish command?

[@jricherts99]

Also the best Plugin for Flattening is call ExactFlat

[@PJChenJewelryDesign]

I wish it has for Rhino 7

[@frogboy831]

Does anyone know how to unroll something without it getting folded over like the second shape???

[@IamAskingWhy]

very informative!!

[@PJChenJewelryDesign]

Thank you

[@JK.handmade.jewelry.Armenia]

thank you, you are great

[@PJChenJewelryDesign]

thank you

[@IamAskingWhy]

please make a video on network surface command and what are the basic requirements to implement it properly ...thanks in advance PJ.

[@PJChenJewelryDesign]

sure. I will put that on my video creating list. In fact, that is one of most asked questions from my students. Stay tuned.

[@PJChenJewelryDesign]

Hi Praveen. Check out the newest video this week here kzbin.info/www/bejne/jHKxlGmOYrWgqJo this is the curve network command video for you. Please let me know if that answer your questions. Thanks

[@GLYNDYER]

Nice tutorials.

[@PJChenJewelryDesign]

Glad you think so!

[@kcjewelryquietcorner]

Great video. Thank you. I would like to see a video on rendering. I am never able to get a nice rendered picture no matter how much I fuss with it.

[@PJChenJewelryDesign]

I use keyshot rendering. it is very easy to use and there are a lot of excellent tutorials online. You can check on www.keyshot.com/resources/learning/tutorials/

[@dusanrajh5025]

Super explain

[@PJChenJewelryDesign]

Thank you 🙂

[@rizkistudio9642]

Hello Pj, thanks for the tutorials. I am a newbie in rhino and i am interest in boat design. Could you give the tutorial about how to make cnc nest plan from Rhino? I think its still have a relation with unroll etc. But its have to good in precision. In my case is hull boat cnc nesting plan. Thank you very much.

[@haniehabrishamchi5227]

perfect 😘🥰

[@PJChenJewelryDesign]

Superrrrrrr!!

[@yousefmansor3040]

helpful video thank you

[@PJChenJewelryDesign]

You are welcome!

[@sasuke89757]

@PJ Chen Jewelry Design - The explanation is so cool. I just had one small doubt. I was trying to use the create UV curve command on Triangular surface and i'm bit confused how it explodes. I was hoping you could help me out with or or tell if there are any other videos related to it. Thankyou.

[@PJChenJewelryDesign]

instead of explode, you may want to split the surface in any shape you like and extract surface instead.

[@hamid.farsidost]

Very useful

[@PJChenJewelryDesign]

Glad you think so!

[@egonssteinboks1562]

Thank you!

[@PJChenJewelryDesign]

You are very welcome!

[@Noyyyen]

Hi is there a way to delete object trim history? And for example is it possible to uv unwrap rhino model in 3ds max or zbrush, to get much closer 2d result and then use it to apply pattern more accurately?

[@PJChenJewelryDesign]

you can try ShinkTrimSurface command

[@Noyyyen]

@@PJChenJewelryDesign Thank you!

[@hairulanuaronline]

Tremendous video.

[@PJChenJewelryDesign]

Thank you!

[@shytavori5570]

Hi, is there a way to get an accurately flattened surface from a developable (not double curved) surface such as in the twisted box example? In the video you show how "Unroll" and "Smash" flattens the twisted box with a 2.65% deviation, is there a way around it? Thanks.

[@PJChenJewelryDesign]

Hi Shy, It depends on your application. If you try to design something in 2D and flow it back to 3D object. UV curve is your best choice. If you want to create something like papakura objects that I mentioned in the video. you can turn the surface in to small pieces of small polysurface then use unroll command. you can check my other video at kzbin.info/www/bejne/e5LClnydnd6Jjrs. thank you.

[@shytavori5570]

Hi PJ, thank you for the prompt reply. The application I was thinking about was similar to papercura perhaps: designing a 3d object>flattening>fabricating from sheet material>assembling to match original 3d object. Creating a polysurface from mesh (as shown in your video "Rhino 3D CAD Technique #1- Folding Paper Technique with Rhino 5") to create many planar surfaces is one way of doing this and the result will be a "pixelated" version of the 3d object. But if your 3d object is made from developable surfaces, as the twisted box, it is technically possible to get an exact model made of sheet material. So I was wondering if there's an accurate way of doing this without any deviations... thanks!

[@PJChenJewelryDesign]

HI Shy, This is a very good and technical question. I don't have a 100% answer for you yet, but I did some research online and find the "DevSrf" extension may help you to solve the deviation issue. You can find the download the extension at wiki.mcneel.com/labs/devsrf . I also find an online discussion about the DevSrf command at discourse.mcneel.com/t/devsrf-how-to-use/44505/6 ,I will dive in the information later on. Let me know if you find the solusion. I would love to hear from you. Thanks.

[@shytavori5570]

Thanks! I'll look in to DevSrf, looks promising. I will let you know if I figure this out.

[@PJChenJewelryDesign]

great. thanks

[@jeorane]

Very useful, but you forgot to mention Squish and Squishback commands

[@PJChenJewelryDesign]

Thank you.and I plan to make another video for squish.

[@harimondal8935]

Thank you....

[@PJChenJewelryDesign]

You are welcome!

[@tanajibirajdar5200]

thank u 😊

[@PJChenJewelryDesign]

No problem 😊

[@seriousCADninja]

Thanks!

[@PJChenJewelryDesign]

You are welcome!

[@kimsonvu]

Thanks

[@PJChenJewelryDesign]

You are welcome.

[@yasinsaglam4158]

Thank you very much for video and explanation. I have a question. What should we do creating exact template if we want to wrap that sphere with vinyl? How to extract exact template for cutting vinyl for sphere? If you answer I will be very appreciated.

[@PJChenJewelryDesign]

it may not be super accurate, but if your vinyl is flat. you can check out unroll command and I have a video here for reference. kzbin.info/www/bejne/e5LClnydnd6Jjrs

[@yasinsaglam4158]

@@PJChenJewelryDesign thank you very much. My vinyl can be strecthed so there will be no big problem I guess.

[@namanhdesign1404]

verry good

[@PJChenJewelryDesign]

Thanks!

[@juliethibout7859]

Great video ! how would you proceed if you have an objet with polysurface that you want to create uv curve from ? can you merge the polysurface into 1 ? I'm creating a bangle that is a rounded square and i want to wrap around a design

[@PJChenJewelryDesign]

Create UV curve only apply to single surface

[@RiddleXpert]

thank u PJ. so can we do flow along surface with those unrolled surfs or not?

[@PJChenJewelryDesign]

it won't be super accurate tho.

[@RiddleXpert]

@@PJChenJewelryDesign

[@constantinosschinas4503]

nice tutorial, why not including the *Squish* command in the comparison?

[@PJChenJewelryDesign]

Good idea, I was not think about it when I made the video.

[@constantinosschinas4503]

PJ Chen Design same with me, i always forget this command, it was added in rhino 5 as a standard one.

[@constantinosschinas4503]

PJ Chen Design projecting curves based on surface normal line and cplane based on the line is a good technique for 100% accurate results from given angle, as well.

[@schmidtpe]

Hello PJ ..I was wondering ..I have a pave style ring I designed flat with many prongs (apx 60) and want to flow onto my ring surface but the prongs all dis form ..how would you go about getting the prongs onto the ring surface? thank you

[@PJChenJewelryDesign]

You can look at the option. click on "rigid=Y". that will make not deform but you will need to adjust the gap.

[@mazdak6952]

what about squish command

[@egonssteinboks1562]

!!!

[@PJChenJewelryDesign]

^_^

[@vasilharizanov4871]

Thanks for the helpful lecture

[@PJChenJewelryDesign]

You are welcome!

[@ffstructures]

thanks !

[@PJChenJewelryDesign]

You are welcome, Goran,

[@mjy596]

Again, thank you for your clear explanation. The few videos I have watched so far have all been very helpful.

[@PJChenJewelryDesign]

You are welcome! Happy to help!

[@jacekm4707]

I constantly getting relativetolerance error hen want to unroll surface form OBJ imported file, and many others, how and what do i change??

[@PJChenJewelryDesign]

unroll only apply to polysurface not mesh.

[@jacekm4707]

@@PJChenJewelryDesign but it is made of polygons, anyway is there a way to convert that obj created in another cad, to something i can unroll?

[@aaronreeves6204]

Love your channel ---- Could you show a video on creating a car cover? I'd like to create fabric panels and unroll them flat to the C-Plane for production. Is it possible to have accurate panel measurements? I have been had deviations of (+ or - ) after I flatten panels (surfaces) or unroll them from a 3D construction.

[@PJChenJewelryDesign]

Hi I have a video for unroll specific on my channel. kzbin.info/www/bejne/e5LClnydnd6Jjrs as far as I know in Rhino backend caculation, You will always have some deviations to trun 3D to 2D.

[@borisriglossaldana7144]

Awesome! im Really really thankfull. Greetings from Perú

[@PJChenJewelryDesign]

super! hello from USA!

[@JK.handmade.jewelry.Armenia]

all your videoes are very interesting

[@PJChenJewelryDesign]

Glad you like them!

[@pruthvirajyadav865]

very useful! the best way of teaching!

[@PJChenJewelryDesign]

Thank you!

[@schmidtpe]

Thanks for the video!..Question : can you scale (up/down) the flattened surface percentage difference before modeling and flowing ?

[@PJChenJewelryDesign]

yes, you do.it will flow size differently.

[@schmidtpe]

I meant if the analysis shows... example:4% larger difference between the 3d surface and the flatted surface would scaling the flat surface up 4% correct the issue so both surfaces would have the same 'area'?

[@PJChenJewelryDesign]

It is a very good question. I may not have a 100% answer since I am not an engineer. However, when a 2 direction surface has been flattened. The way the computer calculates the shrinkage is for the entire area. How it was actually stretched, I am not sure about that part. If you just doing a 3D scale. it is still showing the same boundary. It will only affect the flowing object size, when you flow back. but it does not change the 4% (for example) difference.

[@schmidtpe]

I experimented with it a little bit the other day but ran out of time ...however an experiment ... flatten the srf. check the 'area'... then flow it back and check the 'area' of the flowed surface compared to the original surface ..I'll give it a try interesting ..is this just a rhino thing? or does this happen on other software's?

[@PJChenJewelryDesign]

I am not sure if other 3D programs do that.