SwiftUI Metal shader

Nebula Orb

Warm billowing volume around an off-centre ember of a sun. The sphere is implicit — a disc whose z is solved from the radius — and marched front-to-back in eighteen slices, each one sampling two fbm fields (one warping the other) into a density that ramps through four palette stops. What the transmittance leaves lets the ember through.

SwiftUIReact NativeWeb

Open in the editor All effects

How it works

Nebula Orb is a real [[stitchable]] Metal shader, not a video or an image. It runs as a SwiftUI .colorEffect, so it paints any view you attach it to. You shape it with sliders in a live preview, then export the .metal file and the SwiftUI code that uses it, or the React Native and Web version. No MSL to write.