user11754: I am thinking of trying to make a film with animated matte paintings that are painted.
In the 1989 movie "Batman", some animated matte paintings of Gotham City are seen. How are these animated? In the following image, the smoke from all the chimneys in the image is animated / moving.


user6207: While I'm not aware of the process used for that particular film, one easy way to do it is to film the matte painting, then film the smoke against a green or blue background and composite the smoke over the footage of the matte painting in the computer.
I've also seen matte paintings where a large section is left unpainted. Then live action (or animated) things are filmed which exactly fill in the unpainted area. You could composite them either in the analog realm (by projecting both pieces of footage onto the same screen and filming that), or digitally by using compositing software.

11754: <p>I am thinking of trying to make a film with animated matte paintings that are painted.</p>

<p>In the 1989 movie "Batman", some animated matte paintings of Gotham City are seen. How are these animated? In the following image, the smoke from all the chimneys in the image is animated / moving.</p>

<p><a href="https://i.stack.imgur.com/EArRs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EArRs.jpg" alt="gotham animated paintings"></a></p>
 6207: <p>While I'm not aware of the process used for that particular film, one easy way to do it is to film the matte painting, then film the smoke against a green or blue background and composite the smoke over the footage of the matte painting in the computer.</p>

<p>I've also seen matte paintings where a large section is left unpainted. Then live action (or animated) things are filmed which exactly fill in the unpainted area. You could composite them either in the analog realm (by projecting both pieces of footage onto the same screen and filming that), or digitally by using compositing software.</p>
