I'm trying to figure out how I can keyframe a texture change. With three of my animations, it uses a default texture of the character smiling. For the Attack animation, my texture is the character showing his teeth in an angry way. Older guides I've come across suggest keyframing the textures. This doesn't appear to be an option anymore? Another one showed a Node setup where there was a Mix/Mix Factor, which again, is no longer available. It's just Mix Shader. If I can't keyframe textures changing, what setup could I use with the Nodes? Or is there an even simpler method available?