Some of the greatest artists to live have been using linear algebra to produce masterpieces for centuries. This just doesn't hold.
"Coming up with the picture in the first place" doesn't happen on a physical plane in the mind. One's imagination is connections and concepts which triangulate world with perspective with medium. Making that into some thing that can last and be shared not only produces the thing but builds new connections and concepts to use in production of the next thing.
If you mean "linear algebra" as in code, or computers, these are merely mediums, and tools. And as for drawing 'by eye', maybe this helps: https://www.youtube.com/watch?v=X97bhjx4EaI
"Coming up with the picture in the first place" doesn't happen on a physical plane in the mind. One's imagination is connections and concepts which triangulate world with perspective with medium. Making that into some thing that can last and be shared not only produces the thing but builds new connections and concepts to use in production of the next thing.
If you mean "linear algebra" as in code, or computers, these are merely mediums, and tools. And as for drawing 'by eye', maybe this helps: https://www.youtube.com/watch?v=X97bhjx4EaI