daeva_ash

# daeva_ash The shroud of a daeva: a hole in the night rather than a lit surface. The body is near-black and drinks the temple's ember light, giving back only a cold rim where it turns away from the eye. Smoke churns through it in world space, the hem erodes into nothing, and a flare burns it away from the bottom up along an ember edge. One material serves every daeva. What differs between them is written into per-instance shader data on lane 0: | Lane | Meaning | |---|---| | `.x` | **presence** — 0 not yet arrived, 1 fully here. Sinks the erosion threshold from above the crown to just short of the hem, so a daeva comes into being as a ragged edge and its skirt is always eroding smoke. | | `.y` | **burn** — 0 whole, 1 burnt away. Raises a second threshold from the hem upward, with a hot ember edge riding just above it. | | `.z` | **feeding** — 0 drifting, 1 smothering an altar. Turns the rim from cold violet to ember. | | `.w` | **seed** — a per-daeva offset so two of them never churn in step. | The mesh supplies `uv.y` as height along the part and `color.r` as how loosely a vertex hangs; the vertex hook sways the hem and the rags by the second and leaves the crown of the hood alone. Every fire in the scene throws a little light along the daeva's edge through `catch_light`, which is how a daeva standing over an altar is warm on one side and findable on a dark rim. It is a small number on purpose: an altar light carries an intensity near 40, so a value that looks modest turns the body white.