Random holes/gaps appearing in model after slicing

[samakhoul 0]

I've been 3dprinting with Cura for awhile now, normally if I ran into an issue like this it'd be due to something like the model not being watertight. The weird part with this one is that this model prints perfectly fine at its regular scale, I scaled it down to 30% of its original size and as you can see in the images there are a bunch of gaps/holes appearing on the model after slicing, if I print it like this the model prints with the same gaps/holes. Is there a way to see what the cause of this is? How would I go about fixing it? I'll attach the project file as well as the stls (The stls are already resized, you do not need to resize them). Thanks!

lower teeth.stl upper teeth.stl project file.3mf

Edited July 6, 2021 by samakhoul

[fvrmr 73]

The cause of this is probably that the walls are too thin. You could use print thin walls. Or use Arachne, there I could slice it perfectly, because of the variable line widths. See here:

 

 

 

Here you can read more about our Arachne Engine: https://github.com/Ultimaker/Cura/releases/tag/Arachne_engine_beta

[samakhoul 0]

3 hours ago, fvrmr said:

The cause of this is probably that the walls are too thin. You could use print thin walls. Or use Arachne, there I could slice it perfectly, because of the variable line widths. See here:

 

 

 

Here you can read more about our Arachne Engine: https://github.com/Ultimaker/Cura/releases/tag/Arachne_engine_beta

I did some research after posting this and did try thin walls but it'd only print a weirdly shaped inner-wall and not the outer-shell like it's supposed to, but I was unaware of Arachne so I'lll look into that. Thanks!