How to remove lines based on a STL file?

[duckulapip]

Hi all

I am a noob who recently became interest in 3D printing
I downloaded a STL file which i would like to modify and manage to change the object a little bit

However when i wanted to erase a line from the original STL model, the initial STL model disappears, leaving the lines i drew in Sketchup

Is there a way to “auto” draw all the lines on the original STL model?
Also how to i confirm the lines i drew will be “filled” and 3D printed?

much appreciated!

[tt_su]

@duckulapip

However when i wanted to erase a line from the original STL model, the initial STL model disappears, leaving the lines i drew in Sketchup

Make sure you open the group or component that contains the entities you are trying to erase. Otherwise you will erase the whole group.

Ir you want to clean up all the triangles there are options when you import to do that. (By the way, what version of SketchUp are you using?)

To clean up stuff you have already imported you can use my CleanUp extension: Extension | SketchUp Extension Warehouse

[Geo]

See the tips in this post…

Modifying STL file to add holes. Not sure how to do it

Import the STL into SketchUp. Prior to import, look under Options button. There, set the units to Meters to avoid SU’s issues in creating tiny new geometry. [STL%20Import%20Options] The STL comes into SU as a Component. Explode the Component. Make your modifications. Make it a Component again and confirm via Entity Info that the model is a Solid Component. Solid Inspector can help you find flaws preventing it from being a Solid. https://extensions.sketchup.com/en/content/solid-inspect…