It must be symmetrical or be posed in
a symmetrical manner (in the case of a character model).
It must have a new or existing paint
layer to paint on. For more information, see
Create a new paint layer.
You can paint on both
halves of a model as follows:
If the model is positioned exactly at
the X, Y, Z origin (0,0,0) in the 3D View,
select the 3D Paint brush, and in the Properties window,
select either X, Y, or Z (depending on
which axis you want your paint strokes to be mirrored across) from
the Mirror drop-down menu.
If the model is not positioned exactly
at the X, Y, Z, origin in the 3D View,
select the 3D Paint brush, and in the Properties window,
in the Mirror option, select either Local
X, Local Y, or Local
Z (depending on which axis you want your paint strokes to
be mirrored across) from the Mirror drop-down menu.
