Render Layer and noise problem

[Joanlaninja]

I'm trying to render a scene. I have my objects to render on layer 2 and the mattes on layer 1. I render, but the Layer Reflections, Layer Shadows, or Black Layer Shadows have so much noise that they are unusable. The scene is rendered using only an HDRI. I don't know what to do; I searched the forum, but the topics are from years ago. Can anyone please help me? I don't understand why it's so easy to get a shadow pass in Redshift and so difficult to get one that can be used in Octane.

Im rendering in 32 bits color depth and using cryptomatte. Tried everything to avoid that noise but nothing works.

[skientia]

Due to the myriad of possible causes, without a detailed scene information and print screens, it will be difficult to make any pertinent suggestions as sampling cases are more often than not scene dependent.

This page might help or lead to a solution.

[DinoMuhic]

I'm trying to render a scene. I have my objects to render on layer 2 and the mattes on layer 1. I render, but the Layer Reflections, Layer Shadows, or Black Layer Shadows have so much noise that they are unusable. The scene is rendered using only an HDRI. I don't know what to do; I searched the forum, but the topics are from years ago. Can anyone please help me? I don't understand why it's so easy to get a shadow pass in Redshift and so difficult to get one that can be used in Octane.

Im rendering in 32 bits color depth and using cryptomatte. Tried everything to avoid that noise but nothing works.

Try turning off Adaptive Sampling inside the Kernel.