Love snap kicks, they can be incredible fast and powerful if you have practiced them right. So my favorite front kick is a straight forward version of the "Shadowless kick":
It's a straight forward snap kick to the body or the lower body with the front tip of the shoe. IME, this is a traditional Hung Gar technique and IMO the most effective version of the "Shadowless kick". It should be done from a natural position, perfectly straight forward aimed towards just below the knee, groin or diaphragm. The hands should either be kept still, unmovable, or the left hand (or both hands at the same time) can strike towards or, move in front of the opponent's face, as you kick with the right foot. If you move towards pr strike, it should be done exactly the same time as you strike, or just a fraction of a second before the kick, to get the opponent's attention to your hands. It's virtually impossible to stop it or even notice if done right.
Cute Kung fu girl teaches the straight forward snap kick:
https://www.youtube.com/watch?v=5zxZjLlFMVYShadowless kick in sparring here, at 0.05 to 0.06:
https://www.youtube.com/watch?v=OgQA-jxBAugHere a short explanation of the oblique "shadowless kick", same as the kick commonly seen in Xingyi and sometimes seen in MMA:
https://www.youtube.com/watch?v=QpYnQvKBsMEHigher front snap kick (if the arms are kept still in a guard, it is a high shadowless kick):
https://www.youtube.com/watch?v=9m596C9up6E