In this Tutorial “Geometry Nodes Motion Graphics in Blender 2.92”, Jesse adds first a sound clip in the Video Sequence Editor. Next you adjust the length of the animation so it matches the length of the audio. Back in the video, playing the timeline, you hear the audio. Then Jesse adds a plane in the scene and scales it up and applies the scale. What follows is two full rotations of the plane which is 720 degrees. This just happens in the timeline. Because you want a consistent speed of the rotation, make it a linear interpolation. Next add a sphere, move it up and give it the same rotation. (Tip: for this you can select both plane and sphere and press Ctrl+L).
Some more preparations before we dive into Geometry Nodes
Before we start with Geometry nodes, some more preparations. First select the plane, add a subsurf modifier, choose simple, and bump it up to 6. Then Jesse adds a wave modifier on the plane, which looks already pretty cool. Now, add a subsurf on the sphere, but then just one level. This because the sphere has already enough geometry. To give the sphere some random geometry, add a Displacement modifier using the clouds texture.
That is that. But there is one more thing: the audio doesn’t affect the animation. To solve this, Jesse uses the Height attribute of the Wave modifier. Now, this is an interesting part: watch the video how Jesse uses the Bake Sound to F – curves. The result is that the height property of the wave responds to the audio file. Do the same steps for the sphere. Meaning that the sphere responds to the audio as well. One more preparation: add an icosphere, scale it down and hide it under the plane. Don’t forget to apply the scale.
The fun starts: Geometry Nodes
So, that is that. Now we can really start with the Geometry Nodes on 7:24 of the tutorial. From here onwards, I have to go very concise, so definitely watch the video.
- Select Plane, add Geometry node.
- Insert a Point Instance node.
- For object choose Icosphere.
- Do the same for the Sphere
What you see now in the 3D view is, instead of a solid Plane and Sphere, a bunch of points. As such that these replaces the Plane and Sphere. Including the animation. Next steps follows.
- Importance of the order of the modifier stack. Subdivision first, Displace second, and the Geometry nodes the last.
- Add camera and position it.
- Turn off Environment light so it’s Black.
- Give the IcoSphere an Emission Shader.
- EEVEE render settings.
- Make strength of emission respond to audio. (Same technique: bake fcurves).
The video: Geometry Nodes Motion Graphics in Blender 2.92
Review of the Tutorial
While in this video we use the Geometry Nodes, we didn’t use it extensively. We used only the point distribution node. But very interesting is how we can use audio and make our geometry respond to it. Also, the video shows how to make shaders respond to the audio file. This video is made by Jesse under the name Kaizen Tutorials. What I definitely like is the speed of the video and Jesse’s confidence. Find here his instagram account.