interactive render and more RAM

[Mfriedm3]

So I'm pretty new to Corona render. I have 16gb of RAM currently. My renders are slow but they come out alright. My issue is with the interactive render, it's not very sharp and has a lot of noise. Will upgrading to 32GB of RAM help with the interactive render? any other tips to improve it?  Thanks!

[TomG]

RAM won't help IR render speed or quality. Can you post an example, as I am not sure what you mean by "not very sharp" - my thought at the moment is perhaps you have NVIDIA AI denoising turned on, which could give the appearance of softening the image (see https://coronarenderer.freshdesk.com/support/solutions/articles/12000004976-how-to-use-denoising- for how to disable the "Fast Preview") or that you have Image Upscaling for IR set to something other than 1 (see https://coronarenderer.freshdesk.com/support/solutions/articles/12000060305-what-is-image-upscaling-factor- )

[Mfriedm3]

Thanks. The image upscaling factor is 1.0. I'm attaching a screenshot. This is the best results I'd get after about a minute.

[romullus]

I see nothing wrong in your screenshot. The rendering is very noisy, that's true, but what do you expect from 1 minute render on supposedly not very powerful machine? Render stats shows 35% noise level and that is what you get. You need either let it render for significantly longer, or enable real-time AI denoiser in render settings. As Tom already mentioned, adding more RAM won't speedup the rendering, nor it will increase image quality. The only thing that would affect the speed from hardware point of view, is to change current CPU to more powerful one. If you can't do that, then try to optimise the scene, reduce complexity of materials, look for more efficient lighting setup, or... simply let it render for longer time period.

[Mfriedm3]

Cool. Thanks. Makes sense. It's just that I'm watching tutorials and their interactive render looks much better. Guess they have more powerful computers.. I've attached the same scene after 8 min for comparison.

[TomG]

Yep in this case you can enable IR denoising (NVIDIA) with the Fast Preview option. Thing is, IR is not about getting noise free, that's for final renders; IR is just meant to give a quick look to test lighting, object placement, materials etc. where noise doesn't really matter so much, as it doesn't get in the way of seeing those things (if you are after checking some fine displacement in a material, you can use render regions to focus processing on that section, or zoom in on the IR image, and get that area with that material to clean up faster).