I don't think appearance is important!
I think the following Mobius Chess is reasonable:
. . . . . . . .1
. . . . . . . .2
p p p p p p p p3
r n b q k b n r4
p p p p p p p p5
. . . . . . . .6
. . . . . . . .7
. . . . . . . .1\
. . . . . . . .2|
P P P P P P P P3|
R N B Q K B N R4>back
P P P P P P P P5|
. . . . . . . .6|
. . . . . . . .7/
a b c d e f g h
The board is double-sided so some special rule can be made.
PS:I'm a Chinese and my English is poor.