Worked example — a cohesive warm fragment field

system = "fragment_field"
name   = "Ember Field"

[palette]
stops = [
  { at = 0.0, color = "#1a0500" },
  { at = 0.55, color = "#c8320a" },
  { at = 1.0, color = "#ffd070" },
]

[params]
warp        = "0.4 + clamp(bass * 12, 0, 1.4)"
glow        = "0.7 + clamp((bass + mid) * 6, 0, 0.8)"
color_span  = "0.3"                    # narrow = one cohesive warm mood
color_center= "0.15 + clamp(treb * 3, 0, 0.4)"
saturation  = "0.85 + clamp(mid * 3, 0, 0.3)"

Low color_span over a warm custom gradient holds the whole field in one family; color_center and saturation breathe with the treble and mids.

---