webgl use other magic - this shaders and you can control in vertex shader all your vertex on every frame programmaticly and for this purposes babylon team create node material editor. its very powerful technology. I understand that you experience cognitive dissonance when moving from one technology to another, but for working with GPUs, aembic is not the best solution. this is just my opinion)
and also look at shadertoy https://www.shadertoy.com/
and if you want to move forward in gamedev you dont have other variants) only hardcore only shaders) look at nvidia demo were they shoot one by one balls
this is what happens on your CPU and the picture is drawn for a very long time and after this they shoot from mega cannon all balls at once in one moment this is how the GPU works. And brige between you and this power - shaders