High-end productions undergo rigorous calibration to ensure the "scale" is correct. If the math is slightly off, performers can appear unnaturally large or small, breaking the immersion.
Modern productions utilize binaural or spatial audio, where sound is mapped to 3D coordinates. This means that if an actor moves to the left of the camera, the sound realistically shifts in the viewer's headphones, grounding the experience in physical reality. slr jav originals sexlikereal melody marks better