ember_veil

The ember weather over the lava, drawn on the walls of open cylinder shells so the camera looks through it from any side rather than at a card. Sparks are placed by the angle around the spire and the height above the lava, climb on the clock, flicker on their own phase and die out with height; underneath them a warm haze sits on the surface and thins fast. Instance lane 0 carries the lava's height in .x and the dawn reading in .y.