Here is some screens so its clear.
Here is how i export it, how its in blender:
https://i.gyazo.com/97456ce800c321ee3a25bcc0e852dd18.jpg

And here how it appears in HLMV:
https://i.gyazo.com/8b31121ef3e52b089d6cecb9e3efc764.jpg

Some of the normals are OK, and some of them are very distorted, as seen here.

Hey! Thanks for a great tool, been using it for years. +100 rep for keeping updating it.
But i've encountered an issue. There is only one good custom normals addon i know - Blend4Web. It works perfectly, but when i export my model to smd and compile it to source, model's vertice normals appear distorted. They are custom yeah but the directions have randomly changed. If i restore custom normals in blender, normals appear the same in source.
I would be real happy if there's a way to solve this. I can provide screenshots if needed.
Thanks!