How to get access to the texture generated by built-in Sprite Packer?

I have a tile map which takes sprites from my assets and combines them into one mesh. Now I need to assign material with the atlas texture generated for sprites (sprite atlas).

The problem is that when I take material from one sprite that uses the atlas I need, and assign that material to the map, I get a material with no texture. And attempts to get texture from the sprite return null.

How do I get the sprite atlas texture?

 

That is great, especially if this Tilemap is very flexible and extendable. But also I think it really makes sense to allow the current Sprite Packer to render into asset texture.

For now I will find another way to build atlas for my custom Tilemap. It has very specific requirements so I cant use yours.

Thank you for the response!