Geoboil is a popular effect, It generates boiling effect and bubbles on the surface of an object.This effect can be applied to any geometry rather than using a sphere or torus.In this tutorial i used spherify deformer to inflate the geometry and copied several times over the surface.I used constraint tag which help to clamp it on surface of the sphere.Then using vibrate tag to prodcue randomly affecting scale to the deformer-which results inflating effect.
For shading we need to seperate the inflated part from the actual sphere,For that i used tension tag which generates vertex-map based on stretch or deformation happening in the sphere.
Watch tutorial :
Download project file
Another great tutorial, showing many non-obvious (to me) techniques. Thanks again!
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