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Show Us Your Iray Renders. Part IV

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  • Oso3DOso3D Posts: 15,085
    edited December 1969

    If someone made a 'hdri sky maker' that functioned as ibl, i, for one, would drop cash.

  • mjc1016mjc1016 Posts: 15,001
    edited December 1969

    timmins.william said:
    If someone made a 'hdri sky maker' that functioned as ibl, i, for one, would drop cash.

    Not exactly going to work that way...

    HDR images are just that, images...that can be used for IBL. They give a much 'truer' recreation of the light than a LDR image. But it's still already a form of IBL...and IBL is just a means of having some control over GI (global illumination).

    The Sun/sky in Iray is 'set' to follow real world models...but pretty much only for clear skies.

    What you really want, instead of something that creates 'fake sky' HDR images, is something that will add clouds and turbidity to the 'clear sky' model, expanding its native capabilities...and yes, that can be down with scripting, as the 'big boys' (Maya, etc) have more than just the basic 'clear sky'...as to how easy it would be to do in Studio...I have no idea. Heck, there are even scripts, to do that in 3Delight, too...

    The best bet, though is to use real (usually actual photographic) HDR images that are truly High Dynamic range...and yes, you can generate 'real' HDR images in Vue, Terragen and other similar packages.

  • kyoto kidkyoto kid Posts: 41,847
    edited June 2015

    ...well scripting is definitely not my strong suit so definitely won't be exploring that option.

    Most likely I'll just have to stick to using sky backdrops in the form of photos or generated in Bryce/Carrara and rendered as a .jpg which unfortunately will not help with reflective surfaces like a full HDRI sphere does.

    One of the big drawbacks or "real world" lighting. At least in 3DL you can turn shadow casting off on a skydome.

    Post edited by kyoto kid on
  • StevieCStevieC Posts: 70
    edited December 1969

    aaron575 said:
    I have been playing with this on and off for a couple of days now. I have used the default water shader but it doesn't seem right.

    I usually use Water Dispersive shader, and then turn on caustics in Render Settings........can't really see it here, but this is an example.......

    Streets_of_London_Rain_Final_2.jpg
    1306 x 569 - 487K
  • aaron575aaron575 Posts: 146
    edited December 1969

    StevieC said:
    aaron575 said:
    I have been playing with this on and off for a couple of days now. I have used the default water shader but it doesn't seem right.

    I usually use Water Dispersive shader, and then turn on caustics in Render Settings........can't really see it here, but this is an example.......Thanks for the tip, I will try that out.
    Nice render, love the fox, is that Look at My Hair?

  • StevieCStevieC Posts: 70
    edited December 1969

    Yes, as a matter of fact, it is! Had to do 2 renders and combine them though, as both the Bloom effect AND LAMH Fox fur combined in the scene crashed Daz! Both renders took about 20 hours each on my poor laptop, but I accomplished it!

  • nDelphinDelphi Posts: 1,920
    edited December 1969

    StevieC said:
    Yes, as a matter of fact, it is! Had to do 2 renders and combine them though, as both the Bloom effect AND LAMH Fox fur combined in the scene crashed Daz! Both renders took about 20 hours each on my poor laptop, but I accomplished it!

    Your persistence really paid off. That's a great scene.

  • AlexLOAlexLO Posts: 193
    edited December 1969

    Something new to enjoy, including a metallic sneak peek at Cath's PBS Shaders Vol1 (the beta embargo is lifted LOL)

    "Hunter: The Hunter" - view & like in the gallery for the full sized cinematic goodness :-)

    Hunter-Hunted-Iray-2015-by-AlexLO-Ralvision-medium-061915.jpg
    1000 x 563 - 345K
  • RAMWolffRAMWolff Posts: 10,343
    edited December 1969

    Yup, love that piece there Stevie. Reminds me of a Disney movie scene for some reason.

  • kyoto kidkyoto kid Posts: 41,847
    edited December 1969

    StevieC said:
    aaron575 said:
    I have been playing with this on and off for a couple of days now. I have used the default water shader but it doesn't seem right.

    I usually use Water Dispersive shader, and then turn on caustics in Render Settings........can't really see it here, but this is an example.......
    ...what did you use for the rain?

  • sheedee3Dsheedee3D Posts: 214
    edited December 1969

    mjc1016 said:
    timmins.william said:
    If someone made a 'hdri sky maker' that functioned as ibl, i, for one, would drop cash.

    Not exactly going to work that way...

    HDR images are just that, images...that can be used for IBL. They give a much 'truer' recreation of the light than a LDR image. But it's still already a form of IBL...and IBL is just a means of having some control over GI (global illumination).

    The Sun/sky in Iray is 'set' to follow real world models...but pretty much only for clear skies.

    What you really want, instead of something that creates 'fake sky' HDR images, is something that will add clouds and turbidity to the 'clear sky' model, expanding its native capabilities...and yes, that can be down with scripting, as the 'big boys' (Maya, etc) have more than just the basic 'clear sky'...as to how easy it would be to do in Studio...I have no idea. Heck, there are even scripts, to do that in 3Delight, too...

    The best bet, though is to use real (usually actual photographic) HDR images that are truly High Dynamic range...and yes, you can generate 'real' HDR images in Vue, Terragen and other similar packages.


    And where can those be found?...the real photographic HDR images?...

    any links?...

  • kyoto kidkyoto kid Posts: 41,847
    edited December 1969

    ...the best ones usually have to be purchased. They aren't all that expensive usually but it means spreading your CC # around on the Net more (unless you use PayPal).

  • SickleYieldSickleYield Posts: 7,649
    edited December 1969

    MJC1016 has a big list here: http://www.daz3d.com/forums/discussion/57531/

  • DAZ_SpookyDAZ_Spooky Posts: 3,100
    edited June 2015

    sheedee3D said:
    mjc1016 said:
    timmins.william said:
    If someone made a 'hdri sky maker' that functioned as ibl, i, for one, would drop cash.

    Not exactly going to work that way...

    HDR images are just that, images...that can be used for IBL. They give a much 'truer' recreation of the light than a LDR image. But it's still already a form of IBL...and IBL is just a means of having some control over GI (global illumination).

    The Sun/sky in Iray is 'set' to follow real world models...but pretty much only for clear skies.

    What you really want, instead of something that creates 'fake sky' HDR images, is something that will add clouds and turbidity to the 'clear sky' model, expanding its native capabilities...and yes, that can be down with scripting, as the 'big boys' (Maya, etc) have more than just the basic 'clear sky'...as to how easy it would be to do in Studio...I have no idea. Heck, there are even scripts, to do that in 3Delight, too...

    The best bet, though is to use real (usually actual photographic) HDR images that are truly High Dynamic range...and yes, you can generate 'real' HDR images in Vue, Terragen and other similar packages.

    And where can those be found?...the real photographic HDR images?...

    any links?...

    There are quite a few in the store. There are some free ones out there, and places where you can spend a pretty penny on them.

    Post edited by DAZ_Spooky on
  • Kevin SandersonKevin Sanderson Posts: 1,643
    edited December 1969

    Kyoto Kid, how good are the HDR files made by Bryce? Cripeman has a tutorial showing how to use them in Carrara and it looks like they would be good for something in Iray, but I don't know if they are the correct kind. Any idea?

  • SzarkSzark Posts: 10,634
    edited December 1969

    I think the main question is can any quality HDRI give directional shadows in Iray?

  • tomtom.wtomtom.w Posts: 140
    edited December 1969

    Szark said:
    I think the main question is can any quality HDRI give directional shadows in Iray?

    If by directional shadows you mean shadows that clearly show what direction the sun shines from, then yes, there are many HDRIs that can do that. What you should look for is an HDRI that has a clear bright spot in the sky, the brighter that spot is compared to the rest of the sky the more directional the light is. HDRIs can also be edited, provided you have an image editor that can handle 32-bit HDR/EXR, making the bright spot in the sky lighter/brighter, either by just editing the bright spot or by making the bright spot brighter and the rest of the sky a shade or two darker.

    The level of light can also be easily changed by changing "environment intensity" under "Environment" in the render settings. And that goes for all HDRIs.

  • SzarkSzark Posts: 10,634
    edited December 1969

    Arr got you cheers. I just tested this with one I had that showed a small bright spot where the sun is, cool Thanks. Oh the only trouble with increasing “environment intensity” is that it blows out the HDRI

  • kyoto kidkyoto kid Posts: 41,847
    edited June 2015

    Kevin Sanderson said:
    Kyoto Kid, how good are the HDR files made by Bryce? Cripeman has a tutorial showing how to use them in Carrara and it looks like they would be good for something in Iray, but I don't know if they are the correct kind. Any idea?

    ...I don't create HDRIs (don't have the software or know how to do it), I just render different skies for use as .jpg backdrops. I make a large plane primitive in Daz in the same aspect ratio and then apply the .jpg to it in the surfaces tab a "quick & dirty" solution but one that works.
    Post edited by kyoto kid on
  • Kevin SandersonKevin Sanderson Posts: 1,643
    edited June 2015

    OK, KK, thanks. Here's the video if you're interested. https://www.youtube.com/watch?v=jpxIeoxZuQU

    Cripeman first saves the sky as a .jpg and then exports it as an HDRI.


    EDIT: Found this tute with more details: http://jasongalterio.deviantart.com/art/Using-a-Bryce-Sky-as-HDRI-Light-with-Reality-490202994

    Post edited by Kevin Sanderson on
  • tomtom.wtomtom.w Posts: 140
    edited December 1969

    Szark said:
    Arr got you cheers. I just tested this with one I had that showed a small bright spot where the sun is, cool Thanks. Oh the only trouble with increasing “environment intensity” is that it blows out the HDRI

    You can adjust exposure, to use a term from photography, under "Tone mapping" in the render settings. The default exposure value (EV) is 13, if you increase that value you make the image darker, and if you lower that value you make the image brighter. A change that applies to everything in the scene, including the HDRI. But go easy on the changes, each step up reduces the amount of light that reaches the "film" by half, and each step down doubles the amount of light that reaches the "film".

  • SzarkSzark Posts: 10,634
    edited December 1969

    Oh yeah sweet. I understand Tone mapping but I haven't played with Iray that much to find that it affected HDRI's also. Very cool and again thank for enlightening me.

  • kyoto kidkyoto kid Posts: 41,847
    edited December 1969

    Kevin Sanderson said:
    OK, KK, thanks. Here's the video if you're interested. https://www.youtube.com/watch?v=jpxIeoxZuQU

    Cripeman first saves the sky as a .jpg and then exports it as an HDRI.


    ..now that is interesting. Didn't know that Bryce was able to create HDRIs I wonder if you leave shadows on you'd get shadows from the "sun". Have to do some experiments.
  • Kevin SandersonKevin Sanderson Posts: 1,643
    edited December 1969

    Here's a bit more on it from Horo... I guess it may be an LDRI, unless things changed since 2012. http://www.horo.ch/docs/video/pdf/Transcript_HDRIexport.pdf

  • StevieCStevieC Posts: 70
    edited December 1969

    Kyoto Kid said:
    StevieC said:
    aaron575 said:
    I have been playing with this on and off for a couple of days now. I have used the default water shader but it doesn't seem right.

    I usually use Water Dispersive shader, and then turn on caustics in Render Settings........can't really see it here, but this is an example.......


    ...what did you use for the rain?

    Flink's Rain......applied the Iray Uber Shader, then Dispersed Water, and turned caustics on in Render settings.....

  • kyoto kidkyoto kid Posts: 41,847
    edited December 1969

    ...I think I have that. If not I have Nerd 3Ds rain tool wonder if that will work.

  • kyoto kidkyoto kid Posts: 41,847
    edited December 1969

    tomtom.w said:
    Szark said:
    Arr got you cheers. I just tested this with one I had that showed a small bright spot where the sun is, cool Thanks. Oh the only trouble with increasing “environment intensity” is that it blows out the HDRI

    You can adjust exposure, to use a term from photography, under "Tone mapping" in the render settings. The default exposure value (EV) is 13, if you increase that value you make the image darker, and if you lower that value you make the image brighter. A change that applies to everything in the scene, including the HDRI. But go easy on the changes, each step up reduces the amount of light that reaches the "film" by half, and each step down doubles the amount of light that reaches the "film".
    ..well gave a try and didn't work quite right. Not sure if I am rendering correctly may try the 360° panorama setting

  • DustRiderDustRider Posts: 2,879
    edited December 1969

    Here is a link to a great HDRI of the Pixar campus that will easily give you shadows. The attached image was done with it, and no other light source - you can clearly see the shadow cast by the light in the image (default settings on the HDRI as I recall - except for the rotation)
    https://community.renderman.pixar.com/article/107/luxor-jr-panorama.html

    I've also gotten gtreat results with the Yosemite HDRI's by DT sold here.

    speedtest3.jpg
    1429 x 2000 - 547K
  • sheedee3Dsheedee3D Posts: 214
    edited December 1969

    Folks;


    Lets not forget about her and leave her out...she too deserves to be part of the Iray craze!...


    and by her...i mean Vicky 4


    rendered with HDR as the only light source.

    VICKY_4.jpg
    1024 x 768 - 544K
  • SzarkSzark Posts: 10,634
    edited December 1969

    sheedee3D said:
    Folks;


    Lets not forget about her and leave her out...she too deserves to be part of the Iray craze!...


    and by her...i mean Vicky 4


    who? :)

    Sorry couldn't resist

This discussion has been closed.