Invert Gradient

A horizontal gradient goes from black (left) to white (right). To reverse it, one operation: 1.0 - t.

Flip with 1.0 -

• Left: vUv.x = 0.0 → t = 1.0 (white)
• Right: vUv.x = 1.0 → t = 0.0 (black)

What was 0 becomes 1, what was 1 becomes 0 — the direction completely flips.

Exercise

The exercise starts with t = 0.0 (solid black). Change t to 1.0 - vUv.x so the gradient runs from white (left) to black (right).

Answer Breakdown

1.0 - x is the simplest inversion: input 0 gives 1, input 1 gives 0, and values in between mirror symmetrically.

This trick works on any 0–1 value. Apply 1.0 - to any mask to flip it: white becomes black, inside becomes outside, bright becomes dark.