Miscellaneous behavior of RT GI (scene/game view), light leaking

[AntonioModer]

Images:

1. game-view, not correct GI (“bug”), ligth leak in absolutly dark room
2. scene-view, correct GI
3. scene-view, lighting off (same camera position, like in game-view)
4. Directional Shadow Fallback Intensity = 0 (for remove light leaking; if = 1, then light leaking everywhere)
5. GI settings. This “bug” only in “Performance” mode. If turn on “Quality” mode, then “bug” is disappears, but fps is too low, what is critical for gameplay in low-end graphics-cards.

This bug seen always, if camera not move, in some places. And lighting is explodes sometimes, when camera moves in game-view.
Also i try play with “Exposure”, “Light Cluster” (=100), but result is same, it not affects.
“Specular” not affects, turned off (global, material).
Also tested in Rendering Debugger, turn on only RT GI rendering.

Unity 2021.3.14f1, HDRP 12.1.8

Why in game-view GI not correct work, it can be fixed ?
And, it will fixed in Unity 2023, when RT out from preview ?

Thank you for the attention.

Update (temporary solution):
RT GI settings: “Performance high” mode = “Quality” mode (sample count = 1, bounce count = 1).
This parameters give same FPS, but in “Quality” mode (sample count = 1, bounce count = 1) “bug” is gone.
)

[AntonioModer]

“Quality” mode (sample count = 1, bounce count = 1)

[AntonioModer]

Ok. Real problem in incorrect game-camera FOV :
FOV Axis = “horizontal” and FOV = 70 give real FOV = 42 (seen in debug mode of inspector)

I change FOV to default “vertical” and FOV = 70, and real FOV is 70
Now FPS increased (from 35 to 65) when back to “RT GI Performance Hight” mode, this mode render GI same like “Quality” mode, without light leaking.

This is not a bug )
And now i can use 1080p resolution in game with hight FPS, not 800x450. Im happy
Lol, this problem is started in 4 January and resolved in 4 February

[AntonioModer]

This is also shadows “bug”. GI-RT work not perfect, leaking always is must have in some cases.
For best quality must use lightmaps.

1 image: shadows Hight, lighting-GI leaking
2 image: shadows Ultra, lighting-GI leaking less
3 image: shadows Ultra, Slope-Scale Depth Bias = 0.15, lighting-GI not leaking

Update: need set shadows “Normal Bias” to 1.5 to remove the effect of ladders from shadows on surfaces: