Lighting and denoise in Arnold

Windows → Rendering Editor → Light Editor

→

Create a new ligh group → Add aiAreaLight (same area light as in Arnold lighting menu)

Open the Look through window (3rd icon on R side of Light editor) and Arnold RenderView

In aiarealight menui, set exposure: 10

In aiarealight attribute, Light Filter → Add → aiLightBlocker → place it to the postion where want to block the light, increase density of the blocker

(8:10)

Denoise with Arnold (work in EXR format, and when in CPU render):

⁠

https://www.youtube.com/watch?v=YSAcFE_x-Ds&list=PLbvsJz5ZcmxG3PGzcIic9vz7y3ZxCi_6R&index=2⁠

⁠

Render Setting, Arnold Renderer → Camera AA: 6 (higher value give lower nosie), the rests are 2; Ray Depth: total 10, diffuse 2 → Render in Arnold tab

Click bottom left camera icon in Arnold Renderview (take snap shot for reference)

Back to Render Setting: Common → set CPU render ? →

Format EXR, tick Perserve Layer Name and Merge AOVs, File Output prefix name: Noice_Raw

→ AOVs

tick Output Denoising AOVs,

Put the following avilable AOV to Active AOV box:

N (normal), P(position), albedo (these 3 help to detect and find noise to improve the result)

Go to Render (top bar) → Render Sequence box → choose the file save location → Render sequence

Arnold → Utilities → Arnold Denoiser (noice) → Input, select the EXR file just rendered →

Variance (higher value stronger denoise), suggested min to max between 0.25. 0.5, 0.75;

Pixel search radius (higher be better but longer render), between 9-21;

Pixel Patch radius (to soften the result): between 1 to 5

→ click Denoise

Result → Open Arnold Renderview → Folder (bottom L) → tick use snapahot folder, use snapshot folder for storage

When in GPU render (use OptiX):

⁠

https://www.youtube.com/watch?v=u0NnYRXxrS4⁠

⁠

Set AA sample to 20, Untick Merge AOVs

In Arnold Renderview, Window → Display Settings → Add imager → Denoiser Optix

→ if have to change the parameter of Denosier:

Blend (0.6) lower value give less soft image

Tick Clamp (select range of highlight-shadow range): Clamp min (for shadow), Clamp max (for highlight)

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