In answer to the artists questions:
1) Simply paint the Visnu Murti<img onmouseout="__skype_nh_icon_mouseOut(this);" onmouseover="__skype_nh_icon_mouseOver(this);" name="__skype_nameHighlighting_node_visnumurtibls" skype_name="visnumurtibls" src="chrome://skype_ff_toolbar_win/content/icons/icon_on.png" class="skype_name_highlight" id="__skype_nh_node_id_9" border="none"> in the heart. You can make the individual soul a very small spark, or spark-like.
2) Visnu has more than thousands of arms but for this picture of the tortoise avatara. where Visnu is sitting on top of the hill, he should be shown with four hands only. We should only paint four-handed Visnus and not consult Kalayana-Kalpataru, which is not always authorized.