Abrupt appearance changes

Hi,

I have rendered out an animation where i have set keyframes of parts hiding and showing internal components. As the part transitions from 0% transparency (fully visible) to 100% transparency you can clearly see at the end of the transition the part just dissappears abruptly and is not smooth.

i have uploaded an example of the animation but i am not allowed to share so i will eventually take it down

http://vimeo.com/32961306  pw:swx11

Anyone know what steps i can take to fix this.

Abhinav Chauhan

SolidworksPhotoview 360