[grotesqueness]

Yes.

Miscellaneous Offences (Public Order and Nuisance) Act 1906:

Appearing nude in public or private place
27A.—(1)  Any person who appears nude —
(a) in a public place; or
(b) in a private place and is exposed to public view,
shall be guilty of an offence and shall be liable on conviction to a fine not exceeding $2,000 or to imprisonment for a term not exceeding 3 months or to both.
(2)  For the purpose of this section, the reference to a person appearing nude includes a person who is clad in such a manner as to offend against public decency or order.
(3)  Where an offence under this section is committed in a private place, it is lawful for a police officer to enter the private place without the authority of the owner or occupier of the private place to effect the arrest of the offender.
(4)  In effecting entry under subsection (3), it is lawful for a police officer to use such force as may be necessary to enter the private place.


https://sso.agc.gov.sg/Act/MOPONA1906?Pr...P14-#pr27A-

that is nude or half nude
mean no full clothing or no clothing at the top or bottom

that guys has some partial  covering on top and bottom

so according to law and my lawyers 
it is NOT NUDE!


it is classified as indecency dressing NOT nude


indecent exposure is another law 

public nudity, 
indecency dressing
indecent exposure
all three has it meaning in their public law