crt volume dependent on native resolution even if rasterization resolution is set in the volume

[aniketrajnish]

the crt volume is dependent on the native resolution even if the rasterization resolution is set in the camera volume

I tried to set it manually in the CRT.shader by setting a target resolution (_TargetRes) based on the rasterization resolution from the camera volume and replacing:

• #define res (_ScreenSizeRasterizationRTScaled.xy) with #define res (_TargetRes.xy)
• every occurrence of _ScreenSize with _TargetRes

but still, it was dependent on the native resolution as performance was dipping upon increasing the native resolution; what might be causing this?