The current bones pose number of the model entity. All bones
animation instructions relate to the pose given by this parameter.
1 .. 4 (default: 1)
A pose is a state of the entity's bones, built through ent_animate or
bones_ instructions. For blending entity animations in a complex way,
a model entity can have up to 4 different poses that can be blended
by ent_blendpose() instructions. Pose 1 is used for the visible model
my.pose = 1;