H Depthwise

H1

BL - edge FL
L'U'L2UL'
BR - edge FR
RUR2'U'R
FL - edge BR
LUL2'U'L
FR - edge BR
R'U'R2UR'

H2

BL - edge FL
L2'ULU'L'UL'
LUL2'U'L2UL'
reduction by LUL'
BR - edge FR
R2U'R'URU'R
from JUN
R'U'R2UR2'U'R
reduction by R'U'R
FL - edge BL
L2U'L'ULU'L
L'U'L2UL2'U'L
reduction by L'U'L
FR - edge BR
R2'URU'R'UR'
RUR2'U'R2UR'
reduction by RUR'; from Lars Vandenbergh