If you could share a scene (the 3.2 version) or part thereof which you think is misbehaving, it'd be of help.
Likely, colormapping is different in the SP3 defaults (it's unclamped linear.) than you had set up for 3.2 (i can think of sub-pixel mapping, and baked colormapping+gamma, if not outright clamping).
Under exactly the same Colormapping conditions, and GI methods, all our tests proved to be faster and cleaner on SP3 than on SP2, or of comparable rendertime (+ or - 10% or so) but with vastly improved light flux and noise distribution for SP3.
This said, it may well be you found a bug, a corner case we didn't foresee.
What you wrote isn't enough (at least for me, hey.) to troubleshoot your case.
Likely, colormapping is different in the SP3 defaults (it's unclamped linear.) than you had set up for 3.2 (i can think of sub-pixel mapping, and baked colormapping+gamma, if not outright clamping).
Under exactly the same Colormapping conditions, and GI methods, all our tests proved to be faster and cleaner on SP3 than on SP2, or of comparable rendertime (+ or - 10% or so) but with vastly improved light flux and noise distribution for SP3.
This said, it may well be you found a bug, a corner case we didn't foresee.
What you wrote isn't enough (at least for me, hey.) to troubleshoot your case.
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