How to render a vertices (x,y,z)-coordinates based object ?

Hi,

I have the following problem:

I have a 3D model of a inner ear, which consists of of several individual matrixes so I can access certain areas seperatly. However the model is generated using the scatter function, since I only have the x,y,z coordinates (see model attached). The matrixes itself is quite big, up to 170 000 entries.

In the next step I want to render my model and ultimately generating an stl or obj file. I read that the rendering step could be accomplished using isosurface. However I fail in implementing it correctly…

Could anyone explain me how it is done correctly? Also, will it work for a matrix this big ?

Thank you so much in advance !