OTOY Forums

I'm hyper aware this has been asked a number of times, but I cannot for the life of me get this of this grain in my interior shots.

Exterior with sunlight is completely crisp, but with the interiors I've:
- Emissive sampling rates 15,000
- Max samples 6,000
- GI clamp 10
- Using Pathtracing, but Direct and PMC are just as bad (or worse)
- currently just 2 long cubes with a blackbody white emissive material on both
- tried adding more lights
- tried adding less lights
- tried adaptive sampling with threshold 0.03 and min samples 256
- tried howling at the moon

Reference image I'm trying to mimic is here:
https://imgur.com/1a8Fy0j

Closest I'm able to get (after 6 hours of fiddling) is here:
https://imgur.com/cl5b3Yv

I know we're all sick of these posts, but is there anything we can think of that I haven't tried? I've attempted every comment mentioned in every other thread, and it's still a grainy mess. Nowhere near the sharpness of the reference image.

Someone please lend me a hand here?

You will also realize that at least one setting you've mentioned is wrongly used. I let you find out which one.

Why would you tell someone that is asking for help that you know what the problem is, but you're not going to tell them?...

Upload a scene (strip it of any objects which aren't needed) and we'll take a look

Hi,
I would try to decrease your emission samplings back to 1 and activate AI Light

elsksa wrote:Hi,

Have a complete read over https://www.elsksa.me/scientia/cgi-offl ... r-settings and come back if you are still struggling. You should not be as what I wrote should give enough pointers to handle the situation but I will still be happy to help further if needed.

You will also realize that at least one setting you've mentioned is wrongly used. I let you find out which one.

If you are interested, you could also join the Octane Discord server I am also part of.
Discussions are real-time as opposed to the forum. As you wish. Link in my signature.

If that isnt the cheesiest way of bringing more people to your own homepage than i dont know what that is.
i agree with learning by doing and RTFM is very important (readthefuckingmanual for everyone who knows adam savage), but still.

Try Path Tracing, give it about 3000 samples for interiors, pull GI clamp down to 5, activate AI Light, activate adaptive sampling and leave it at default.
for your lights (be it via texture or arealight, use Texture emmission with a gaussian spectrum for lightcolor control, thats way better than blacklight.
power for a texture emission with gaussian texture only needs to be around 1 for good illumination
be sure to have surface brightness turned off, thats only for monitor type like materials.
have sampling rate all at the same niveau, 1 is good. turn single lights up if you know grain comes from that light.

and most important: Activate your denoiser in the camera

Do you use Denoiser?

Ilius wrote:

elsksa wrote:Hi,

Have a complete read over https://www.elsksa.me/scientia/cgi-offl ... r-settings and come back if you are still struggling. You should not be as what I wrote should give enough pointers to handle the situation but I will still be happy to help further if needed.

You will also realize that at least one setting you've mentioned is wrongly used. I let you find out which one.

If you are interested, you could also join the Octane Discord server I am also part of.
Discussions are real-time as opposed to the forum. As you wish. Link in my signature.

If that isnt the cheesiest way of bringing more people to your own homepage than i dont know what that is.
i agree with learning by doing and RTFM is very important (readthefuckingmanual for everyone who knows adam savage), but still.

Try Path Tracing, give it about 3000 samples for interiors, pull GI clamp down to 5, activate AI Light, activate adaptive sampling and leave it at default.
for your lights (be it via texture or arealight, use Texture emmission with a gaussian spectrum for lightcolor control, thats way better than blacklight.
power for a texture emission with gaussian texture only needs to be around 1 for good illumination
be sure to have surface brightness turned off, thats only for monitor type like materials.
have sampling rate all at the same niveau, 1 is good. turn single lights up if you know grain comes from that light.

and most important: Activate your denoiser in the camera

So linking someone to a perfectly good resource, that someone has spent time and effort putting together (for zero financial gain btw) is now a crime these days?