Thank you for your continued support.
I’m using SketchUp Pro 2025.
This time I want to create a road that slopes along the slope of a mountain.
When I watch YouTube, it looks easy to create.
Please let me know if you have any good apps that you use.
(Google Translate)
いつもお世話になっております。
スケッチアップ Pro2025を使用しています。
今回は山の斜面に傾斜なりに道路を造りたいです。
YouTubeを見ていると簡単に作成しているように見えます。
皆さんがお使いの良いアプリがあったら教えて下さい。
And then what’s the problem? Where are you stuck, what’s not working for you?
I modeled the mountains and roads separately.
Even when I combined them, there were places where the road was buried due to the difference in elevation of the mountains.
On YouTube I found a video where the road was carved out with the sandbox tool even though the models were drawn separately, but I couldn’t understand why this was happening.
Today I asked a question in the hope that there might be a tool or drawing method that even I can understand.
私は山と道路の別々でモデリングしました。
それらを合成しても、山の高低差で道路が埋まってしまうところが出てしまいます。
ユーチューブでは別々に作図したとしてもサンドボックスツールで道路を削っている動画を見つけましたが、なぜそうなるか理解できませんでした。
今日は、私でも理解できるツールや作図方法があるのではないかと期待して質問を出しました。
First, we will learn how to draw roads using 4 types of small models. Thank you.
You can try doing this on sections of road, and you do the intersections manually, connecting those separate roads.
Sorry I read it.
・Fredo Spline
・JHS PowerBar
・Fredo6 tools
I will install these.
I will practice drawing roads.
you’ll also need LibFredo. it makes Fredo’s extensions run. don’t forget it 
Got it! Thank you!
An Extension called Instant Road Nui will do this for you. Maybe the video you saw used this extension?
It’s in the 3d warehouse by author Chuck Vali. I believe it costs $38 US. It can create intersections too, i think, so that is worth having if you need complex roads.
Another options is that you can draw a road in an old fashioned method.
You’ll be helped in this by a few extensions, such as
Flatten to Plane and Upright Extrude
Upright Extrude is a simple and free extension that will take a face and extrude it along a path (a curved edge or series of edges). The extension works like Follow Me, but it maintains a vertical face orientation. This means it can be used effectively to extrude the profile of a road.
For this method, you will create a series of edges/arcs along the path where you want your road to be. The path may cut through the terrain or float above it. It’s important that the arcs are smooth and form a nice road alignment.
You will then create a face that represents the shape of your road.
Like this (red area is the face)
Then, you can extrude the Red face along the path you created, using Upright Extrude. (it works the same as Follow Me).
Your new 3d road will be floating through, or sitting above the terrain (or both). At this point you can redraw your path or move it around as you please, and regenerate the road shape using Upright Extrude.
Finally when you are happy with the road, you will want to merge your terrain with the road. So you need to do a few extra steps.
Then use the road outline +5m that you just create to drape onto your 3d surface. This outline is selected, and becomes one of your Contours. Create a Group from the outline.
Then you need another outline. This one will be the bottom face of your road.
Then , once you have the two outlines, you can position them onto your surface and use Sandbox tools “Create surface from Contours” to join them together.
Thank you, AK_SAM.
It’s amazing how the sidewalks and roads are created together.
I’m used to using Followy, so I think I can understand it quickly.
I’ll look for the software tomorrow.
(Google Translate)
The trick is to make the 2D Face with little steps or notches in it, which are the locations where you want to change the surface material.
When the face is extruded, those become the footpath, berm, or carriageway of the road.
if you need help dimensioning your street, here is a nifty tool
(language is top right)
no export for SU though, you’ll have to redraw it there.
I know! I always try to create sidewalks and roads.
What is this!
It’s so easy to understand!
And it’s in Japanese too (^O^)/
Thank you.
I’ve checked out the functionality of Instant Road!
It’s amazing!
I’ll have my company buy it for me the next time my subscription renews (^^♪
Until then, I’ll learn how to use it using the method that mihai taught me.
Thank you for the great information!
Instant Road を機能を確認しました！
凄いですね！
次回のサブスク更新の時に会社に買ってもらいます(^^♪
それまではmihaiさんに教えて頂いた方法で
操作を覚えます。
良い情報をありがとうございました！
Wow, I need to digest this a little bit. I’ve been trying to develop a workflow that will result in TIN break lines but outside of Civile 3D I haven’t been able to find the right combination of tools. My brain was telling me the drape tool was part of it, but then getting the inside of the break lines to be even surfaces was where I kept getting stuck.
I’m going to follow this workflow a couple times and then see how I can modify it to get to where I’m trying to. Thanks!
