Issue about 'last integration time is infinity.' in function render_rays/raw2alpha(Line118)

[jiaxiangshang]

Nerf is really excellent and useful that I have learnt a lot. But I meet a problem that I can not understand. Question: Making the last integration time is infinity leads to the last element of alpha(array) is always the largest(1.0). It means the last sampled point on the ray will always be given the largest weight for both color and depth. May I know how can nerf benefit from this?