creo8 config.pro option documentation for: DENOISE_RENDER

denoise_render
yes
, no
*
Sets the denoising effect before you start the real-time rendering process. You can still toggle on or off the denoise effect if needed. Selection of any option takes effect in the current session.
yes
- Turns on denoising when you start real-time rendering.
no
- Turns off denoising when you start real-time rendering.