I am aware of changing color or opacity on a timeline for particles. Is it possible to do this also for regular models? For example, if I want a character to change from red to blue gradually or to become invisible gradually, how do I do this? I've tried going to different places on the timeline and changing percentages of transparency or color, but the program changes these characteristics to whatever the current percentage or color is for the entire timeline. I've looked for a way to put a curve for transparency on the timeline, but have not found it. This is probably a simple question for someone who knows the answer. It's not simple for me right now. Thanks.