I am stuck with this problem: my model (at frame 1, when the visible blue arrows should be fully opaque) renders as attached: they seem to be partially transparent, at random locations, in a noisy way. Can anyone explain this and point out what I am doing wrong? I am happy to hear any other comments too (how the model could have been set up in an easier way).
I must add that at two random times during this evening the 3D rendered view in the viewport looked OK, without this strange behaviour. I could not associate these with any particular action.
Tesla cavity v03.blend (1.15 MB)