fr the animation pane in powerpoint there should be an option to start animation at beginning of slide
when I do a 3d image like earth and do turntable, I would like to have the animation start at the beginning of the slide.
To do this select the 3D model and on the Animations tab in the ribbon. In the Timing section go to Start and choose "With Previous". This will start the animation when the page is loaded. It also works for the first slide of your presentation.
Isaac Romano commented