Your comment couldn't make me any more pleasure! Thank you for listening so attentively!
So, I think you have very well understood the program of this fantasy. A dreamlike world, more or less lucid, more or less controlled, that can tip over at any time at the border of the nightmare. This is indeed what happens at the beginning of the second part. Is it intuitive on your part when you evoke the laughter of the devil (bassons, bass clarinet and contrebasson), but it is not for nothing that I called this cauldron "the bearer of light" (Lucifer in Latin...) (I thought the allusion would remain discreet, but your sagacity highlighted my little esoteric incartade, which was for me a "clin d'oeil", I also have fun with some concealments that amuse me a lot...).
The "choral" part of all-classic harmonization is suddenly broken by this whistle that throws a kind of sarcastic fanfare in rhythmic superposition (the 2 of the military march superimposed on the 3 of the choral). I thought of a noisy parade scene, interrupting the almost dormant meditation of the faithful, like a merging.
For the next part, introduced by a few soli, it is a piano meditation, slightly punctuated by the strings in harmonics, sul ponticello, mixed with a flottando, effectively combined with vibra, glock, celesta, harp and tubular bells in the distance (a slight tam too).
Indeed, the very end (last note) of last movment may be a little long to make it heard. It is in fact after the solo of low flute and flute of a tenuto note to the violins 2 that goes al niente except the viola solo that ends alone. The compression of Youtube is not ideal to hear this detail perhaps.
In any case, your attentive word orders me to continue! I'm going to run out of time, but I'm currently on a new attempt and I'm scratching my fly legs as soon as possible... (As you can check on the attached photos! I'm working on it... It will be for orchestra and the solo clarinet will have a major role).