What is the current method for timing The Host Tomb? Cause it doesn't have the white brick. I remember being told that it's when the screen is kind of half white, or maybe when the player would have touched the brick if it were there. But I think we need a more consistant method, such as the first frame the screen starts going white, or the frame that it goes completely white.

it should be starts going white

it's when it starts going white, but anyways you shouldn't be too concerned with timing. I retime everything anyway.