I need help with making a 2D Nextbot (Sprite in 3d enviroment.) Chase enemy for a horror game

I’ve moved on from making my adventure game in favor of a more advanced horror game that involves you running away from an enemy that’s constantly chasing you, I preferably want to make a 2d Nextbot, another problem, I can’t get the engine to work with transparent images, So I would like a little help with both… (K so little update, I got a transparent sprite in the world, he is an AI and moves around, only problem is there’s a problem with the sprite’s collision and he will not Chase the player.)