You can download the project File:FlowerTutorial.sifz used for the screenshots.
Select any format you want, and ensure that "Use current frame" option is unchecked (otherwise, one frame only will be rendered). The petals are hidden until 4 seconds, and then grow quickly between 4 and 5 seconds, and stay still the last 1 second too.Ĭlick on "File → Render" to render your animation. The stem grows for 4.5 seconds and then stays still the last 1.5 seconds. Notice how (half of) the waypoint changes from a green circle (meaning smooth animation of the amount parameter) to a red step (meaning that the amount parameter is suddenly stepped). Alternatively, we could have achieved the same effect by setting the In Interpolation of the waypoint at 4s to "Constant". So from 0f to 4s the Amount value will be equal to 0, and at 4s it will suddenly changed to 1, and make the petals visible, as expected. This means that after that waypoint, the Amount value will remain constant, until another waypoint is encountered. Scale them down with the Scale Tool, and move them, so they are hidden by the stem, as shown. Now click on "4s", and on the Layers Panel, select all the petals layers (with ctrl+click), then press Ctrl A to select all the petals vertices. On the Keyframes Panel, click on "+" to add a new keyframe. On the timetrack, click to place the cursor at 5 seconds. That means that we need a keyframe at "5s". Because the shape/position of the petals is not fixated at this moment of time by any waypoints or keyframes. But if we will go to "4s" and modify them, then they also change at "5s". Switch to "Animate Editing Mode" again by clicking on the green circle at the bottom right of the canvas. Let's say we want the petals to appear a little after 4 seconds in the animation, and be full size at 5 seconds, instead of being visible and full size all the time. We want the petals to appear and bloom almost at the end of the growth. If you go back to the first keyframe, you'll see that the petals are visible.
Note that the duplicated petals are also linked to the stem.
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