In Hinduism, what do three white lines with a red dot on top represent on the feet of the deity?

Answer 1

The three parallel lines of Vibhuthi or Ash is worn and the significance of the same is given below. The Red dot mentioned by is a Tilaka symbal denote decorative and is also an identifying mark also indicates good omen and purity.

Vibhuti is a symbol worn by the Hindus who are worshippers of Shiva. Vibhuti can be applied on the forehead and other parts of the body in the form of three parallel lines. Only those who have received Theedchai or initiation are allowed to wear in this manner. This initiation prepares the individual to destroy one's world of attachments. Thus wearing Vibhuti in the form of three parallel line indicates the destruction of the three Malams namely Anavam, Kanmam and Maya. Hindus, who are not initiated, smear Vibhuti on the forehead and over the rest of the body just like Shiva has besmeared his body. Still others wear Vibhuti as a small circular dot on the forehead. This is the site of the third eye of Shiva which opens in an individual, to reveal to him the true nature of God, Soul and Universe.-

Answer 2

no idea, i'll let a hindu answers this one! lol