I can open this model with version 7, but its painfully slow. The size is 330 MB. I have been able to open with Metal: work in progress, and it is a dream. However this last revision I am getting this phenomena where 5 seconds after it opens, it shards. I am not sure if that is the right description. Ok looks like whole screen 8bit video game explosions.
I’m guessing you don’t have nearly enough RAM to support a model of that size. What could possibly be that big? I’ve been doing this for 30 years, and never heard of a single model that large.
did you mean 335 MB?
In rhino>preferences>advanced search for tessellation
you will find rhino options.opengl.use tessellationshaders check the false checkbox.