Denoising in Rhino
Thea for Rhino comes with two different denoising methods. NVIDIA® OptiX™ and the Built-in implementation (Non-Local Means or NLM). The first step before enabling a denoiser is to select the denoising method from the Thea Render Settings.
Go to the Thea Render panel and from the Render Settings tab select the preffered denoising method.
1. Using NVIDIA® OptiX™
Open Thea Darkroom and switch to the Channels tab. Enable the Denoise channel and start rendering. Once the rendering has finished you can use the channels drop-down to select the Denoise channel and see the denoised image.
When the Denoise channels is checked, Thea will automatically use the extra channels that are required by Optix to denoise the image properly.
Requirements: Your system needs to have an NVIDIA GPU in order for Optix to work. Optix works with the Presto engine.
Tip: While you may switch to the Denoise channel at any time, it is advised to wait for the image to finish and then switch.
2. Using the Built-in Denoiser
The Built-in denoiser (Non-Local Means) works in the same way. Switch to Built-in from the Render Settings (Thea Render panel) and then enable the Denoise Channel. The Built-in denoiser has the following parameters that can be accesed from the Display tab.
Strength: adjusts the overall noise removal of the image.
Details: Higher values will try to keep most of the details of the original image.
Requirements: The Built-in denoiser does not depend on the hardware but it is only available for the Presto (MC) engine.