There is also some control over variable circle of confusion size, making it dependent on camera focus distance and aperture.

An exaggerated shallow depth of field:

Now we implement that swept disc shape in a shader, and put it on a quad.

The quad needs to be parallel to the camera plane, and aligned with the velocity projected onto that plane.

An ember flying towards/away from the camera degrades to a circle of confusion on a square quad.

Needed to hold up close to the camera as well

This is my vfx test scene for Time Ghost, the Unity demo we’ve shown recently.

The escape sequence needed tons of flying embers. Usually out of focus to some degree, and motion blurred, as that’s how we’re used to seeing them on screen.

repo: github.com/robcupisz/fl...

For the love of our eyeballs, do not align your ember particles to velocity!

Don’t give them that comet texture either, ugh.

Let’s make
✨physically based flying embers✨

A Unity vfx graph implementation and explanation below. 🧵

Some tech details: discussions.unity.com/t/making-of-...

…also featuring ML-based cloth deformation, running in Unity Sentis.

Download: assetstore.unity.com/packages/slu...
Some tech details: discussions.unity.com/t/making-of-...

First Time Ghost scenes released! ✨

We’ve just published two projects: showcasing the character and the grassy environment scene.

Have a look at the real-time hair simulation…