Show Us Your Iray Renders. Part IV
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I was playing around with some depth of field render settings in Iray today. I was using my Own 3000gt model, and a picture I took on exit 19 on I-81 in NE Tennssee a few weeks back. with my powershot camera
I created a HDR light source in Photoshop. and loaded t as a hdr image even though the picture was not panoramic. that is how i was able to achieve a pretty decent shadow under the car. other wise I could not get the shadow hardly to visualize at all using the preset sun dial settings. its pretty neat trick to add HDR light sources to stock pictures . I'been learning these tricks to making them in photoshop if anyone is interested this is a good artical for getting started. http://photoshopcafe.com/tutorials/HDR_p/hdr-ps.htm
Peace:)
click for best view 11080 HD
If the render finishes it finishes. What matters is what the final render looks like. Are you saying that in 90 minutes, the render stops, and it looks bad, or at least, unfinished? By "unfinished," there is still visible noise ("grain") in the image, meaning those pixels have not fully converged. Iray has no other quality metric than this.
When you add an HDR image, Mr. Sun goes away. To see the sun, it's either Sun-Sky Only, or an environment Dome without an image. You'll note that if have a Dome choice selected, and you remove the HDRi, the sun settings appear. Otherwise, they get hidden.
Whatever weak shadow you had with the HDRi alone probably came from the original image. Adding a bright spot someplace on it, and resaving it as 32-bit, can add enough dynamic range to produce some nice shadowing detail, as you show. Well done!
I've never tried to turn off the Quality. For most final image renders, I use Max Samples: 15000; Max Time: 0; Rendering Quality Enable: On; Rendering Quality: 1.00;and Rendering Converged Ratio: 100%. I've never had a render cut out at less than the Rendering Converged Ratio unless I hit the Cancel button. And I'm running a year old out-of-the-box HP Envy with integrated graphics and only 16GB of RAM. (Win7Pro 64x)
Edit: Do you mean the renders cut out before complete? Or just that you can't get the images to keep going until you cancel, like Luxus/Reality et al? I don't think you can make Iray continue to render indefinitely. But if you Enable Rendering Quality, you can set the value high, and Iray will take much longer to reach the Rendering Converged Ratio.
Very minor like in this render *Nudity* http://fav.me/d9bjghk the britney's character's dark lower legs and some of the skin had faint noise left on the surface. I PSed it our with a mild blur brush. (Old Reality trick) I really like the fact that darker renders does not slow iray down and one can use more realitic "off character" lighting unlike lux if you dont have a light pointing directly at a character the dark areas will take eons to clear up.
Thanks will give that a try
OT I was driven nuts with my newly installed 980 colors were all off. Searched the web tried some suggested fixes to no avail. Went back to the shop who suggested I contact Nvidia, I got a live agent late last night by the time I got up I had a message how to remove the drivers in safe mode and do a fresh re install and woila all was right as rain again. Impressed with Nvidia support..
Hmmm. That's a tough scene. But it's pretty clean, comparatively, for its dark areas and overall tonality.
"Darker" renders can slow down Iray if there are insufficient "photons" (really, ray trace hits) to judge convergence. It just may seem like a reasonable render time given your hardware, which at 1500 cores is not bad. It's hard to tell from the render if you have sufficient light in the scene, and have tone mapped it down, or if it's underlit. The former is generally the better approach, render-time wise.
The Iray documentation always refers to convergence as an "estimate," so if your renders are coming out pretty good, in Iray's judgment, the pixels have converged.
Suggestion: Instead of using the blur tool, which just smears all the pixels under the brush, in Photoshop make a copy of the render layer, and in the copy above add a layer mask. Fill it with black, and with the white brush touch over areas where you see any unconverged pixels. When done, on that layer alone, apply Filter->Noise->Despeckle. You can reapply this filter multiple times for stubborn spcekles.
This will apply a despeckle filter to just the masked areas. Unlike blur, which changes all the pixels that are touched, the despeckle will preserve most non-noise pixels (i.e. detail), and blend in the noisy ones only when needed. The rest of the image is untouched because only the masked layer is affected by the filter.
You can also try it with the Dust & Scratches filter, and there are some third-party despeckle filters for Photoshop that have finer control over the process.
Cool man thanks for the PS tip. I cant complain overall I am pretty pleased with the decision to purchase the ROG laptop and pop the 980 in the tower. Most renders look good after 15 to 20 minutes I just let them run longer to clean them up better, even the darker scenes for the most part are less then 1 hour. Iray cleans up better then lux as well. Coming from 6 plus hours of luxrendering this is a great step foward in PBR rendering without the need to perform voo doo dances or build mega render farms.. Its faster then 3DL when using foilage and hair...
*Nudity* What else LOL its all part of the latest chapter in my long winded stories.. http://fav.me/d9bmmyc
My wife and I want to do some more traveling, but I can't leave work for that long. Your posts about your ROG (didn't know what that term meant) has me now considering my options. We can visit far-away lands AND I can still get my work done. Being self-employed for 40 years, I've never had a paid vacation. I've always have to choose between giving up a salary for 2 or 3 weeks, or staying chained to my desk, with its big tower PC. For various reasons, I've tended to pick the desk.
Freedom! At last!!
Asus ROG= Republic of gaming 24G GTX980M laptop..I kinda lucked out for the 980 the AMD fire pro I had was acting up and I had bought an extended plan, which I always do since we push our machines hard. All I had to pay was the difference between the value of the AMD and Nvidia.
Sorry double post
..cutting edge in the 80s? That would either be a C 64 or and Amiga.
...have never been and never will be a fan of the cloud for anything.
The major bottleneck will be your connectivity.
That is why I amd looking at sinking the funds into a dual 8 core Xeon system with 4 Pascal GPUs and 128 GB of physical memory.
Do you really need two Xeons for fast Iray renders? How much of the work does the processor do?
Cheers,
Alex.
I also try to lift items up by tiny fractions of a millimeter; nothing rests perfectly on the floor.
Heh, nah, I think it was 1989 and I had a cutting edge PC for college... it had a terrifyingly robust 64 MB harddrive. SO MUCH SPACE it needed to be partitioned into two drives...
Okay,
maybe it's allready asked, but...
i'm using characters based on V4 and M4, just for fun.
Does anyone know if there are iRay skinshaders available for these old generation 4 figures, or does anyone know which settings to use?
THX.
Patrick.
http://www.daz3d.com/jm-humanshader-for-iray
Skin is hard, man. Hair is hard too.
This image is okay. I've used Beautiful Skin Iray and UHT Hair Shaders but I'm still not satisfied.
Still, Daz is always an ongoing project.
The issue with the shadows you're getting here is that they are uniform and there is no progression from much dark underneath the car to lighter near the edges.
You can only get realistic dinamic range by using a high quality HDR images for lighting. The Dimension Theory HDRIs are around 100MB. I think the images themselves are very good as far as lighting and reflections go, it's just the shadows aren't doing what shadows should do, because the light source your're using does not have a high enough dynamic range to produce them.
Another example of iRay skin :)
Back in the day, the Cray 2 supercomputer had an amazing 36GB of disk storage. Nowadays, an I7 could blow a Cray 2 out of the water and my latest PC has two 5TB drives.
Cheers,
Alex.
It's just amazing walking into stores and seeing 16 GB USB drives for maybe ten bucks, and I'm thinking of that first computer that had 16 MB of _hard drive_. Man.
(I bumped into a woman on the plane who had worked on Apollo 11 and was talking about the computers they had on the rocket, which are probably beaten by stuff you have in a cheap watch)
128 GB flash drives available for 30-40 bucks online.
Here's a couple of samples (Iray) with SAV Twingo Hair. Used the Genesis 2 Female fit and Slosh's UHT Hair shaders. Interesting difference in render time (GTX780). The full body shot renders in 2 minutes at default render settings. The closeup renders in 12 minutes at the same settings. Only difference is adding a second camera for the closeup.
Shaders used: Sickleyield's Beautiful Skin Iray (nuff said), Sloshs's UHT Iray Hair shaders (also nuff said), Aged Leather Shaders for Iray (Khory, very underrated in my book), Metal and Gemstones (JGreenlee).
For those that like believability/realistic and appreciate great textures, the outfit is Shifting Images Leather Fantasy Armor for G2F. Fabulous detail. Khory's leather shaders were used without replacing the texture. Set lighting by Sveva and OOT. Floor by Sveva.
@Tjogn
The saddest part about that, is the truth about it.
@Apothis68
Love it.
Lillith
Playing with sun/sky environment. I'm running with problems if I want the sun to be visible. Increasing the haze or lowering the overall light strength works but also makes the whole scene too orange/yellow or too dark. Do you know any way to avoid this? What I want is a visible sun in a blue sky. Thanks for your help.