Here's the free version of the dirty splatter assets (it's the same, limited to 1 texture; no need to download it if you already got the full version). 9 splat assets included.
Along with it, there's a small demo scene showing ways to animate the assets! Here's how that look: video preview.
Both techniques have been used in this scene, if you want a "real-life" example :P
How to add an asset into a scene:
1) Add a "CustomUnityAsset" atom, by clicking the "+" icon and then selecting "Misc"/"CustomUnityAsset", or by clicking on the cube icon to have this preselected. Then click on the "Add Atom" button.
2) Select the added atom and go to its "Asset" tab.
3) Click on the "Select file..." button and browse to this AddonPackage.
4) Finally, select the asset of your choice in the asset list.
How to use the demo scene
Open the scene, click on the buttons, try to figure out how it works!
How does the demo work?
The first example (scaling up) is pretty straightforward: the UIButton activates the assets (stream & splat) and starts the animation using AnimationPattern.
The Animation Pattern does 2 things:
The end.
The 2nd example is a bit more complex. It uses Timeline on the 2 assets at play: the falling splat and an additional small splatter projection. Only 1 anim on each, plus one to properly reset everything.
The anim is pretty basic: Timeline only controls the position. It starts high then quickly go at floor level. And there's a trigger track where the (small) complexity resides. The reason why I chose Timeline for this example is because it's easier to see where are located the trigger events compared to the position of the asset - but it could have been done with AnimationPatterns as well if you wish to avoid this dependency.
The triggers will mainly change the shape of the asset by altering differently its scale on all axis, using ColorScale plugin.
The "Reset" button triggers the "Reset" animation, that'll instantly reset the scale to the value at the beginning (drop-like shape) and hide the assets. Then show the "Start" button.
"Start" button will show the asset and start the anim. Done.
For the splatter assets:
For the demo scene: