I’m a New User in blender and here in the forum too.
I do know if this is the correct place for this post, i apologize right now if not.
Please, i need your help, if possible.
I am trying to design my house as my first job in blender cycles and i am not able to get into a good final image. There seems to be much noise, but still do not know how to solve, have watched severel tutorials, but without success.
I ask you to give some direction on where I should start trying to fix the problem.
First, 250 samples is not that much, I would go for 400 samples. You will probably still find some noise but at this point you have to choose between quality and performance. Most methods to reduce noise in cycles reduses how realistic the light is reflected, because the noise comes from light that bounces of materials. Here is a tutorial that may help you to reduce some of the light bounces.
It works like a photography machine, and in this case you should reduce the ISO. In Digital Photography ISO measures the sensitivity of the image sensor. The same principles apply as in film photography – the lower the number the less sensitive your camera is to light and the finer the grain. Higher ISO settings are generally used in darker situations to get faster shutter speeds (for example an indoor sports event when you want to freeze the action in lower light) – however the cost is noisier shots.
Thank you all for your help. My computer is not the best. It is an AMD Phenom II X4 820 Processor, 4.0GB RAM, NVIDIA GeForce 6150SE nForce 430. Then 400 samples makes my renders take too long, but I decided to heed his advice.
As I changed several settings in my scene, I decided to start the scene from the beginning. I’ll post here for you the process. Please, if possible, help me come up with a really good final image.
Obs¹.: beCoarse, “opened the door” for my scene now appears to be even brighter. The impression I have is that before I was really forcing the sunshine, now seems much improved.
Obs².: rally86, I increased the number of samples from 250 to 400 to improve the level of testing I’m doing, thank you. The internet here in the office where I work is not the best so I’m not finished watching the video tutorial you suggested, but I am slowly seeing here. I’m watching now.
Obs³.: BoringGuy, how do I reduce the ISO in blender cycles?
Yes the third is better, you don’t see as many small dots in the white color.
If you decrease the clamp value to 1 you will get less noise and a bit darker image.
I don’t know if you have a wall behind the camera, but if you don’t you may want to turn either the sun or the environment light down a little. It also look like you have change the direction of the light. But it is better lighted then the first render.
Just a thought that you don’t need an HDRI environment for a scene that is enclosed in geometry to this extent. No one including you has mentioned checking the multiple importance box so I’ll add that suggestion here. Although it would be nice to have a weight instead of a checkbox - and there may be one! - this allows for fewer wasted samples and reduces noise considerably.
I moved and rotate my camera to focus on only two wall.
Now i have just two walls in my scene.
I modeled all the furniture except the flower pot that I downloaded to study how to model, but I ended up leaving only to compose the scene.
I read and liked. Thank you. I don’t know much how i can used this now in my scene, but i saved the link for future consultations. If you can help me how i use this specifically, I would greatly.
I delete the HDRI and leave the background black?
Thank you all.
In my next render, i will decrease the value of Environment Light. Was very bright, but with little noise.
Currently, I am also facing a “Noise Problem” with Cycle Rendering. Most of my 3D artworks were recently rejected by the top Photo Stock website, although I have rendered with more than 3000 samples (5000x3000pixels). Especially when there are glossy, glass, transparant or transluent materials. Even with only diffused materials, I still can notice a remarkable noise and color reflection from other objects (I don’t use reflective materials). Is it the problem of Cycle Render? If I try to import the file into other 3D software, will I still facing the same Noise problem? Is noise problem commons to all software? Thank you very much for your advice and suggestion.
If you use the glass shader you should probably go up to about 1000 samples. It is true that more samples will give a more clean image but it will take a lot of samples to increase the quality just a little. My first suggestion is to use “no caustics”. Otherwise follow the other advises that are given in the thread.
Diffuse materials are supposed to give and receive color reflection from other objects. If you want your material not to receive color from other material you have to do some treks that you can finde here http://cgcookie.com/blender/2013/02/26/blender-cycles-light-path-node/
I dont know about render engiens outside blender, but I will expect that noise will be a problem with any render engien that works with realistic light paths.
Hi Rally86, Thank you very much for your suggestion.
Now, I try to increase the rendering samples up to 5500 samples for my artwork intended to be submitted as examination images.
Actually, the previous render (around 2500-3000 samples) images are already accepted by most of other Photo Stock websites.
Only that top website, rejected four of my images with reason of noise.
Just a few days ago, I learned how to remove the global illumination lighting effects from one object into other objects. This tutorial is very useful, and could reduce the noise or color contamination in unintended area in the scene.
Hi Rich, you have created a very nice scene. The composition and the detail looks perfect.
Anyway, on my notebook screen (full HD), I noticed “NOISE” on the entire screen, a kind of small white dots.
But on my HD TV screen, it looks okey. You said that you rendered this scene at 3500 samples.
May I know how much is the pixel resolution? How long did it take with your system.
Now, I am still anxious about Noise Problem in Blender Cycles.
I rendered some of my artworks even at 5000 samples, but still can notice the presence of noise in certain part.
I have tried to use the No Caustics option, path-nodes, and reduce the usage of reflective materials.
But the outcome is not so clean. Still wondering a wayout.
