Arnold bryian

I seem to have encountered a weird problem where when I want to modify an object it disappears and only highlights the faces and edges and the only way for the object to be visible is to enable the construction plane. Is there anyone with a solution to this kind of problem? It is not a memory restriction because I am using just 60% of it when running Houdini.

I want to submit a space ship for marvelous machines need some critique on the work so far.

this is my first time working in Houdini and I want to submit this space ship for the marvelous machines contest. This is so far one half need some critique on it.