4 Dec 2017, 19:15

To add to what others have said, one of the best ways to develop your imagination is research. I remember a video of Jake's where he showed his vast Pintrest library that he uses in creating many of his illustrations. You can't draw what you don't know. Like @carriecopa said, most of the big studios take research tours or bring things to their studio (I recall a live lion being brought to Disney for Lion King). Don't know that there are techniques for developing your imagination save from just drawing anything and everything to build up your internal library of images. Same goes for environments.