Why my render quality drops in indoor lighting?

James

Why my render quality drops in indoor lighting?

Example:

https://prnt.sc/-hpugiY0vYUl

I just notice that the quality of my render in indoor lighting seems to drop down quite significant compare to render in indoor using light coming from outside through the window.
Like not sharp, grainiy and blurry. I use the same render settings. basically default, except for denoiser in on, and samples 2500.

Is this normal?

If yes, how to keep the quality the same?

DrunkMonkeyProductions

It's 'normal', you just don't have enough light for that low a number of samples.

To keep the quality similar, you'll need to either...

A) increase the interior lighting(intensity and/or number of lights)

B) change tone mapping settings

C) increase samples.

 

James

Thanks a lot.

crosswind

And more emissive lights + non-HDR light sources in an interios bring you more light bouncing among the internal objects (ceilings, walls, furnitures, odds and ends... yada yada ) which is much complex than a single light source from an HDRI. They can easily result in more grainy noises, therefore more time or more samples will be required for getting a good result of pixels convergency.

StratDragon

While there is no single magic bullet to indoor lighting I personally find ISO value in the render tab key to narrowing a good exposure for an image: Below are some web suggestions but these are not hard/fast rules:

• ISO 100: Use this for sunny, outdoor settings.
• ISO 400: In this range, we're talking cloudy days with imperfect light.
• ISO 800: Use this for indoor settings with less amount of light. .
• ISO 1600, ISO 3200, ISO 6400+: This is for pictures in the dusk and evening, where light is imperfect.

generally the higher the ISO the more noise the image tends to generate, but with trial and error you may find a compromise.
 

 

Ascania

Why does the quality of pictures you take with your phone camera drop in indoor/low lighting?