- float dist = (length(normalized_pos) - PREFIX(inner_radius)) * PREFIX(inv_radius);
- float linear_falloff = clamp(dist, 0.0, 1.0) * pihalf;
+ float dist = (length(normalized_pos) - PREFIX(inner_radius)) * PREFIX(pihalf_div_radius);
+ float linear_falloff = clamp(dist, 0.0, pihalf);