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Writer's pictureEllie Wilcox

Troubleshooting Collision Issues in Clo3D

Lessons from My First Twitch Livestream 🎬✨


Pattern making in Clo3D is already a detailed art, but adding a live Twitch audience? That’s a whole new level! I recently went live on Twitch for the first time, excited (and a bit nervous) to dive into some 3D pattern making while sharing the process with others. The most surprising challenge? Juggling real-time pattern adjustments while managing a lively chat—and facing the dreaded collision issues. It made me realize just how tricky balancing all the tech details can be, and I so I thought I'd share what I learned both about Clo3D troubleshooting while streaming! So, here are some techniques we used to handle collisions in Clo3D, plus some reflections from my first Twitch experience!


The Collision Issue: When Layers Don’t Play Nice 🤦‍♀️

If you’ve worked in Clo3D, you know that layers can sometimes seem to have minds of their own. It’s like they’re covered in adhesive spray, colliding just when you need them to stay apart. On stream, I faced some classic Clo collision issues that reminded me to bring it back to basics. Here’s what I found helped (and what I think will make any future streams a smoother ride)!


1. Using Strengthening and Freezing to Control Fabrics 🧊💪

One of the quickest ways to keep fabrics from colliding is to use the Strengthen and Freeze tools in the 3D window. When you strengthen a fabric, it stiffens up, making it far easier to manipulate without as much draping. This is especially handy if you're working with gathered, multi-layered garments where layers can quickly get tangled.


On Twitch, I found that freezing the bottom layers of my garment once they were in place gave me better control. It let me pull fabrics around without disturbing the bottom layers. It also prevented my laptop from working as hard (which I realize, the added strain of streaming was bogging it down!), allowing my computer and me to concentrate on the current simulation at hand.


2. Deactivating Patterns (with Sewing) Temporarily 🧵🚫

Another lifesaver I discovered is the Deactivating Patterns with Sewing feature. Let’s face it, sometimes we don’t need every single piece of our garment interacting in the 3D window at once—especially on a livestream where the stakes (and distractions) are high. By deactivating patterns temporarily, you reduce collision risk and make room for other parts of the garment to fall into place.


I used this technique to simplify the 3D simulation similar to how freezing works except this also turns off the sewing, essentially allowing any neighboring pieces to lay more smoothly. Not only did this help the other active pieces sort themselves out, but it also gave me a chance to double check seams and make sure they weren't the problem!


3. Mastering Layers in 2 Ways: Object Browser & Set Layer Tool 🧩🔢

Layers in Clo3D are like a double-edged sword. They’re powerful, but they can get chaotic fast—especially when streaming! Here’s what I learned about the two main ways to control layers in Clo3D, which kept my patterns behaving (more or less) in front of an audience.

  • Using the Object Browser: In the Object Browser, you can assign layers by number to different pieces, helping control which parts sit on top or below others. For example, if you’re creating an outer jacket and inner lining, you can layer them correctly here, reducing collision risks.

  • Using the Set Layer Tool: The Set Layer Tool is another must-have for pattern makers managing multi-layered garments. By clicking the pattern pieces sequentially, I could keep the layers from collapsing into itself, which kept things from looking messy on screen. On the stream I lost track of what layers were on top of what and decided to start over. This was a great reminder of how important it is to keep your 2D workspace organized!


Quick Tip: Whenever you set layers, make sure you use your 2D window to help you keep track! Rearrange the pieces so they are in line horizontally if they are on the same layer, and you can arrange the next layer above to keep track!


4. Using Pins to Spread Fabric Apart 📌💡

Ah, pins—the ultimate fix when your fabrics won’t stay where you want them! Adding pins can hold pieces apart in the 3D window, making it easier to manage flow and troubleshoot collisions. I used pins during the livestream and they worked wonders in holding the layers apart.


If you’re working on a tricky garment in Clo3D, pins are a simple yet effective way to get layers behaving. Click while holding the W key to add a pin in the 3D window. Right click on the pin to delete it, or all pins in the workspace. Or you can attach it to the avatar.


5. Superimpose Options: Side, Under, and Above 🌈🔄

The Superimpose options (Side, Under, and Above) are a huge help in managing how the fabric interacts. This tool lets you choose how and where a selected piece appears relative to others, reducing collision and improving flow. During my live demo, I used Superimpose to adjust a layered skirt with gathered flounce and keep it from sinking into the garment—a common collision spot in 3D pattern making.


Here’s a breakdown:

  • Superimpose Side: Positions the fabric alongside another.

  • Superimpose Under: Places it below the target layer.

  • Superimpose Above: Sets it above.


On Twitch, experimenting with these live showed how it doesn't always work great, but when it does, it's perfection—so it's a must-have in the toolbox of any 3D pattern maker.


Final Reflections: The Thrill (and Challenge!) of Going Live as a 3D Pattern Maker 🎉📸

Going live on Twitch for the first time was eye-opening. I’ve gotten pretty comfortable in Clo3D, but the added element of interacting with viewers brought a fresh layer of challenge (pun intended). Talking, focusing on patterns, and troubleshooting in real-time stretched my skills (and patience) in unexpected ways! I learned so much about pacing myself and thinking through explaining the techniques.


Sure, we were on the struggle bus for a while, but there was something so rewarding about connecting with other pattern-making enthusiasts who encouraged me not to give up. The experience reminded me why I love this craft and our community and how exciting it is to bring others into the world of 3D pattern making.


I’m already looking forward to the next stream, feeling more prepared and excited to dive deeper into pattern making, and whatever design challenges come my way while streaming it live. Clo3D might have its tricky moments, but with every problem solved, I get a little more confident—and hopefully, I can provide a little "edutainment" along the way!


If you didn't catch the stream live you can watch the replay here: https://www.twitch.tv/videos/2291247208?t=00h06m34s


Please excuse the fact that there was no audio for the first 6 minutes and when there was, the audio quality wasn't the best. I'm working on getting that resolved more my next stream so stay tuned!

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