public bool NextVertex(ref SurfaceIntersectionData hit, ref RayData pathRay, ref RgbSpectrum throughput, int depth, out float pdf)
{
var currentTriangleIndex = (int)hit.Hit.Index;
var lt = Scene.GetLightByIndex(currentTriangleIndex);
var wo = -pathRay.Dir;
pdf = 1f;
if (hit.Brdf.IsSpecular() || depth == 1)
{
if (lt != null)
{
var le = hit.Color * lt.Emittance(ref wo, out pdf);
throughput.MAdd(ref throughput, ref le);
}
}
return false;
}