I worked on the trailer and demo of Tracks of Thought as a technical artist. Tasks I did ranged from creating animations with variable sprites to implementing a smooth texture swap and fixing visual bugs.
For the animation that shows before card battles start, Sam Morris created a couple of animatics, which I animated in Unity. I also designed and programmed the functions that display the correct name and character sprite for each character, which is necessary for the different battles.
The fade to a different material makes use of propertyblocks to limit material instancing, and was cut for the demo but made it into the trailer. It also laid the groundwork for the current* in-game tech that handles the swiching of the materials, which was rather easy to implement after making the trailer shot.
*At least for a while after, I don't know the current state of the back end.