allow me to offer some more advice.
For your IR, use 50 hpsh and 20 interp, for LC lower to 1500subdivs (if only for single frame) , untick stored direct light, change scale to screen, turn on pre-filter set to 20, change filter to nearest.
Change noise threashold QMC sampler to 0.004
Also make sure that in the GI rollout that both 1st and 2nd bounce are set to 1.0
For your IR, use 50 hpsh and 20 interp, for LC lower to 1500subdivs (if only for single frame) , untick stored direct light, change scale to screen, turn on pre-filter set to 20, change filter to nearest.
Change noise threashold QMC sampler to 0.004
Also make sure that in the GI rollout that both 1st and 2nd bounce are set to 1.0
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