APV splatters "probe flares" across the scene

Unity Engine
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2

ADD

What I tried to do to fix it

Option A: Adaptive Probe Volume Options

As official documentation said, inconsistent GI might be unsharped with the following:

Inside Adaptive Probe Volume Options, I checked

  • Sampling Noise on, playing with different values, and set
  • Leak Reduction Mode to Quality.

Result: Global illumination from small intense areas is still inconsistent over the probe volume.

Option B: Filtering with Rendering Layer Mask

Since I rely on the guess that GI is approximately consistent near the emission areas, the idea was to limit the influence of different groups of static geometry inside adjustment volumes.

Note: First of all, I followed instructions from this APV RLM thread.
Steps:

  1. I added the Probe Adjustment Volume in Override Rendering Layer Mask mode for both of indirect emitters (say, glowing ball and area light).
  2. I set both of theirs Mesh Renderers to newly created Rendering Layer Mask called APV_Emissive.
  3. I mapped masks in Lighting Window (Ctrl+9), on Adaptive Probe Volumes tab, inside Rendering Layers, keeping lower priority for APV_General and higher one for APV_Emissive.
  4. I rebaked APV with this set of filters.
  5. I even rebaked APV with different set of filters to investigate the result.

Result: Filtering meshes with different rendering masks don’t affect.

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I also tried to create bigger Probe Adjustment Volume similar way for Rendering Layer Mask called APV_General. I did it intentionally to be sure, for example, I didn’t have success because adjustment volumes should be nested.

Either way,

  1. Filtering meshes with different rendering masks don’t affect.
  2. Indirect lighting produces inconsistent values over the APV.

Remark: I spent a lot of time to find a possible duplicate of this topic but didn’t find anything like this. I will be glad to know and close this one as duplicate. Any help will be appreciated. Thanx in advance hug.