Show Us Your Iray Renders. Part IV
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Thanks!
They may be different, but I see them being used interchangeably to tie different parts of an image together. Besides reducing artifacts, when compositing from different sources the different parts can have different levels of sharpness or 'graininess.' Adding some grain or noise can smooth out this distinction and help tie the whole composition together.
I figured Ill jump into the disscussion
..fell so out of touch with this thread with the whole changeover. Finally, the email bots are working again.
Still working on skin and eyes, this is my 2nd render. Better than the first but still trying to figure out some settings on G2.
Not really...because it is 'noise' that is used to simulate 'film grain'. And really, on a piece of film, what is the 'grain' other than the random 'noise' of the particles that make up the film.
'Grain' is just 'noise' that you want, applied in a controlled manner. A lot like dandelions....if you want to make dandelion wine they are not weeds...if you don't they are.
An Old comic I want to remake using iRay...a lot of work to do.
You're work looks great in Iray Zilver!!!
thanks, Mattymanx!
...that's really nice.
Ha! I love Genesis bot.
yep, she's a real KO
..love her expression in the last pic.
Want to recreate this scenes on iRay, when Zelenna was created.
my vacations starts next monday, plenty of time to render, yay!
...several pages back I posted an Iray version of the first full scene I ever did over seven years ago. As the original file was lost in an HD crash I needed to recreate it as closely as possible to the original. The only differences were a few props (freebies that were also lost in the crash and are no longer available) and my G2F version of the main character. Sadly it seems to have been overlooked and for the time being, probably cannot be viewed as there is an issue with attachments to older postings being broken.
The solution to robot-o-phobia: The Ice Cream Robot!
(Fat Bob and Evo and all kinds of iray shaders)
Another render of main character in my webcomic, Emily Siljean (Genesis Bot woot)
I saw her, is the lady surrounded for robots, sat on a cilinder?, I think is very resemblance of the original.
btw, some dudes ask for Goccin on DA, but she only evolved to my Archangel Sayumi, she has the same...qualities.
Did this one today testing out what happens if you make an emissive, then set the lumens to a negative value. Results are fairly neat; it seems to cast light thats the color opposite of what you enter. The magic circle is set to white emissive, neutral temperature and -1000 lumens.
Whilst this image lacks some sharpness and clarity, the reasons are low lighting, and the fog FX. The distant fog past the Tunnel mouth was created by a Free Iray Fog Cam courtesy of DeviantArt, the foreground fog was created in Photoshop with Topaz Lens Effects and the Lamp Godray was from a set I have from RedEyeCat.
If it's of any help, The Iray Render settings wer thus:
Max Samples:- 15000
Max Time:- Full (It took a bit less than 4 Hours - 1920x1080 Pxls)
Render Qaulity:- 1
Rendering Converged Ratio:- 99%
Enviroment Map:- OmDawn_EnvM.hdr
Currently I'm only running 1 GPU - MSI GTX960 4Gb
Haven't posted in a few weeks. Here is one of my new images. Iray renders.About 30 minutes on a 750 Ti.
Um, no. This is incorrect and basically an opinion. You can boil it down/resolve it in your head in any way you like but they are not the same.
Grain is NOT noise, nor is it random noise that makes up film particles. Grain is the result of the chemical reaction that occurs when light reacts to film emulsion. Film grain gives life to the moving image. Noise is noise. In the digital world, it is sometimes used to soften FX work. Grain is often (almost always) added to digital work as well but it is actual film grain that is used, not noise. Noise isn't used to simulate grain ever (except maybe by an amatuer who doesn't know what they are doing).
Noise is unwanted analog noise from a sensor (an electronic reaction when light hits the sensor). Grain (chemical reaction when light react to emulsion) is STILL wanted by 90% of the cinematographers I know.
(From other sources) -
Grain is the (visible) crystal grain structure on film. The higher the speed
(ISO/ASA) of the film used, the more grain dots are usually noticable (because of the larger crystals/dye clouds
compared to a "slow" film) and result in a picture with with less resolution. Underexposing also leads to more visible grain.
Noise is signals recorded by a digital
sensor (or post-processing, i.e., JPEG artifacts) that aren't really there. High temperature, high ISO setting and long shutter speeds can result in a colorful pattern across the final image that give a fuzzy and unclean look. Underexposing also augments visible color noise.
It's like calling a VFX shot a special FX shot. These are both entirely two different things as well. VFX are creating in a computer, whereas, special FX are physically created in front of the camera, on set, on the day.
These differences may not matter to you, or may seem trivial but they are not to all of us who do this for a living.
Shawn, you are speaking about noise inside the camera itself and grain in the processing of film. mjc1016 was referring to grain and noise in digital processing (software.) He is correct that grain used in digitally processing an image is in fact a form of noise, as in a 'noise filter.' (re: Photoshop/filter/noise/add noise...)
Noise created at the sensor level is only present in the image, not inside the camera. Grain is in the emulsion period (not processing) and becomes noticeable after light interacts with it. The grain used in post to add to an image is still grain (when done correctly) taken from "stock grain" if you will. Noise added in post is similar and technically isn't noise.
I'm not trying to be difficult here, just trying to keep info straight. Maybe I'm on a different page?
Grain can be applied to digital images and video in post-processing to give the impression of being analogue images, which is done by applying an overlay of real photographic grain (to get the random pattern of real grain, which is very different from electronic noise, and can't be perfectly simulated electronically). But what is usually applied in post-processing, to reduce/remove color banding and other problems, is dither, which is only a fancier name for noise. So yes, noise is applied in post-processing.
Easy to read articles:
Grain: https://en.wikipedia.org/wiki/Film_grain
Noise: https://en.wikipedia.org/wiki/Image_noise
Dither: https://en.wikipedia.org/wiki/Dither ;
Too much noise in here. It goes against the grain.
Iray renders, remember?
Yes, that is basically what I was trying to say. While you are technically correct in everything you are saying 'within the context of the photographic process itself.' What was being discussed was not that. It was post processing using software, in which the terms have different meanings and uses. Thus the different page. Open Photoshop, click on filters and look at "noise" ... as I mentioned before. It has nothing to do with the image sensor of a camera.
As to IRay renders, the noise we were talking about does relate to compositing rendered images with other sources in a way that can help blend the sources together.
I had to do a ton of post work on this one because I get alot of red specks all over the parts of the image that are hit by the light emitter. Is there any solution for this?
In any case, even if I don't have an NVidia card I just love Iray, fantastic improvement.
And where can that webcomic be found again, Mr. Timmons?
I finally called up EVGA this AM... wondering where my replacement card is. I confirmed with the guy the tracking number and he confirmed that they do have the card and he was moving the card up in the que to have it mailed out. They are either behind or someone just lost it in the mail room there. I'm so mad about that. So waiting now for my confirmation email ... if I don't get one come Monday I'm calling them back up again. This is getting ridiculous! I may never do business with them again after this... we shall see.