may be i having passed wrong texture in awe.projections.add as below

awe.projections.add({
id: zoneUser.email + '->' + Math.random(),
// geometry: { shape: 'cube', x:50, y:50, z:50 },
geometry: {
shape: 'plane',
height: 10,
width: 20
},
rotation: {
x: 0,
y: getRotation($scope.poiBarrings[zoneUser.fullname]),
z: 0
},
// rotation: getRotation($scope.poiBarrings[zoneUser.fullname]),
material: {
type: 'phong',
color: 0xFFFFFF
},
texture: {
path: 'img/tmp-0.png'
},
}, {
poi_id: zoneUser.fullname
});

and updates by 6 frames using your code

var butterfly = awe.projections.view(zoneUser.fullname);
var i = 1;
b.update({
position:{ y:1 }, // use a minimal non-zero update here
material: {
color: 0xFFFFFF
},
animation:{
duration:0.2, // 5 animation steps are 1/5th of a second
repeat:5, // play for 1 second total
persist:0,

                        step_callback:function() { 
                          i++; if (i>5) { i = 1; } // add time scaling here if the animation is too fast
                          b.update({ texture:{ path:**['img/tmp-0.png', 'img/tmp-1.png', 'img/tmp-2.png', 'img/tmp-3.png', 'img/tmp-4.png', 'img/tmp-5.png']**} });
                        }
                      }

please check n confirm my code to solve the problem..
what should i pass in texture at projection add? and can you send me your working demo with this update code.
thanks in advance