DWG and SVG output produces different results

Here’s the DWG, that includes 100% of what I see in the wireframe view:

And here’s the SVG that includes about half of the lines… and I don’t see any options for tangent lines, etc, although this is a flat state surface:

Btw, an AI export didn’t produce anything visible at all, regardless of how I scaled/moved around the art board… not really great results, imo.

What am I missing?

smash.3dm (99.3 KB)

Hello - here is what I get from svg … in Illustrator:

and the file -
junk.zip (3.4 KB)

Is that what you expected?