There are 8 entries shown for SketchUp exe running, and the Task Manager dialog has many more entries. They seem to be running but not opening the main SketchUp window. Try 'killing' all of the 'SketchUp' entries and retry... I also see that your system dialogs display using oriental characters [Japanese?]. What is your Windows user-name ? If it's in similar characters I am wondering if that is causing problems with reading some file info. Your user's SketchUp Plugins folder and certain 'preferences' files are located in your 'AppData' tree. e.g. C:\Users\YOURUSERNAME\AppData\Roaming\SketchUp\SketchUp 2018\SketchUp\Plugins It's hidden by default...

I'm sorry but this shouldn't be called a tutorial. Yes it could be called how I drew a house. But it is not a good teaching aid. I have a fairly good idea of what I am doing and I struggle follow what you are doing. To a beginner it would be incomprehensible. A tutorial needs to be clear, concise and understandable, you need to see what tools are being used and how. For some reason your cursor isn't being recorded properly so it isn't clear what is being done. A demo perhaps, a tutorial it is not.

https://www.vectary.com/3d-modeling-how-to/how-to-create-usdz-file-for-ar-online/ https://github.com/drwave/usd-sketchup Do some googling...

Would love to see Dave and David's work in place in my home!

Are you asking for a half mold? Anyway if you have a solid and a you put it in a larger cube... Reverse the faces and you have a "negative object". But perhaps you want half molds--which it seems are needed to print. Then you can put a plane down the middle of the object and the cube and intersect faces. Depending on your shape this can be simple or it can require more planning and knowledge. For printing the shape has to be solid and a clean, solid original shape should lend itself to being a mold. I'm just saying it shouldn't be a trick or require special tools. The shape is the mold itself, you just have to show where the mold material is around it.

You might also to want to trap to avoid trying to switch off the 'current layer' [which is usually, but not exclusively, Layer0], otherwise that could throw an error...

so cool

I don't have the issue with anything other than spheres, not in Sketchup, not in kerk. I don't get it.

Welcome to the forums, Guillaume! Looking forward to seeing some of your work here.

https://extensions.sketchup.com/ru/content/s4u-slice

Thanks Dave. I asked the other person to install cleanup and run it on the stl before sending the file to me - and when I opened it it was perfect. I've modified it had it exported as stl again - converted to g.code and printed it. It went flawlessly. Thanks again for your help.

For a definitive answer you need to consult legal counsel. One thing is clear, if you are using SketchUp in any commercial way, you need to be using SketchUp Pro or SketchUp Shop. If you are charging people to see your tutorials, you can't legally do it with SketchUp Free or SketchUp Make.

thank you very very much, i have now installed the license key... nice weekend...

By using only two contours each time you are naturally creating hard edges at each join. Use more contours and get smoother transitions.

I'll send you a PM shortly.

Thanks! I'll try that to see if it helps

Could you open the Ruby Console before launching BezierSpline, and check if there are some error messages. Thanks Fredo