tes_plasma

Surface shader for the tesla-coil plasma arcs. Renders the compute-built billboard ribbons as electric beams: uv.x runs across the ribbon and shapes a white-hot core line (core_color, core_power) falling off to the outer glow (glow_color, edge_soft), with per-vertex brightness/surge from the arc compute pass boosting strikes (surge_boost). Output is HDR so bloom carries the discharge; alpha fades the ribbon edges so overlapping arcs read as light.