I'm just trying to update the camera to tilt upwards or left-right in its reference frame. However, I'm having trouble (I'm new to three.js). I have been trying applyMatrix, and camera.matrix= etc. I would like a method that can rotate the camera by any quaternion, and I haven't found a tutorial that shows how to do this.
FWIW, right now I have camer.matrix.multiply(somematrix) where somematrix is generated by a quaternion. This doesn't seem to be working.