Loading...
> >

any advice on how to use a figure shadow effect on wall in Iray?

ToobisToobis Posts: 993
edited March 2018 in The Commons

I am trying to do this with godrays: https://www.daz3d.com/epic-props-godrays-volumetric-light-for-iray so preferbly would like advice from someone familiar with this product as I am not having a lot of luck in what I am trying to do in Iray.

I am trying to have scene where a prisoner is in jail and someone opens the prison door and the prisoner looks up at them and the sillouette behind the prisoner is that of the person who has opened the door whom is staring at them. In pic one is the basic scene with the Godray prop behind the guy staring at the prisoner and the second pic is of the sillouette of the guy that is barely there at all much less to a point you could make out what it was or what the person was doing. This should work in theory.

Anyone think of how I could do this or any methods I might have better luck with? Thankyouuuuuuuuu.

 

Post edited by Richard Haseltine on

Comments

  • LinwellyLinwelly Posts: 6,070

    From what I take from your screenshot I have the impression your spot ind with the the godray prop is too far away from the prisoner. When I use the tool I have the figure I want to render engulfed in the layers of the godray prop.

    Two thing to consider : I never tried to place a camera inside the acitve layers of the prop, so not sure if that will give satifying results.

    second, I'm not sure ( never had the focus on that part) if the shadow cast by that will be clear cut. My estmation would be that no. IOf you use the spotlight from the prop without the godray prop that might work ( but then there is no atmospheric effect)

  • Dim ReaperDim Reaper Posts: 687
    edited March 2018

    I'm not certain that Daz Studio is capable of doing what you want it to with a single render as it doesn't have true volumetric lights.  It is easy in a program like Vue (I once used it to make a bat signal shine on the clouds), but that doesn't help when you are working in Daz Studio.  I tried something similar for the image shown below, using the same godray props that you linked to and eventually I gave up and used a couple of renders and Photoshop to get the image to work how I wanted it to.  The godray props set is nice, but not very effective for shining around a figure from what I saw.

    You could perhaps use a bright light for the shadow cast and then combine that with a different render of the godrays, or fake them in a paint program. 

    I'm not sure if linking to other places is allowed, but if you enter rays of light photoshop brushes into Google and click the link at the top which starts with "22 rays of light brushes..." then there is a page of free photoshop brushes which might help you to achieve the effect that you want.  The ones that come up on that first page are the oens that I used for my image, but there are others on that page, also for free.


     

     

    Post edited by Dim Reaper on
  • Serene NightSerene Night Posts: 17,704
    edited March 2018

    Photoshop. Make a layer over your image and paint over him a shadow shape in black. Change transparency and layer styles until your image is similar. I would suggest the darken layer style

    Post edited by Serene Night on
  • HavosHavos Posts: 5,630
    edited March 2018

    What kind of light do you have behind the figure casting the shadow? For the best results you should use just a single spot or point light, as this will cast the sharpest shadow. Avoid too much light inside the jail, as this will soften the light of the shadow. Obviously the light behind the figure has to be carefully positioned to get the shadow in the right position.

    Below is the effect I got with one bright spot light behind the figure at the door, and another dimmer one to light the figure in the jail.

    SpotLightShadow.png
    1024 x 1024 - 890K
    Post edited by Havos on
  • Richard HaseltineRichard Haseltine Posts: 109,510

    You can - in Iray - is the dispersive settings (there's a water preset to look at) on a cube to get atmospheric effects like crepuscular rays

  • KitsumoKitsumo Posts: 1,222

    Sickleyield has a tutorial on it(Deviantart.com - may be NSFW content on page).  It works for me.

  • FishtalesFishtales Posts: 6,224

    A bit late I know :)

    This is a spot geometry set to rectangle behind the camera with the camera just inside the door in front of the figure standing there. The second image has a volumetric cube inside the building just slightly smaller. Both renders were stopped before completion. The first 3 hours+ and 70%. The second was 4 hours+ and didn't even register :)

     

    wall-shadow-test-copyright-002.jpg
    1280 x 720 - 528K
    wall-shadow-test-copyright-001.jpg
    1280 x 720 - 615K
Sign In or Register to comment.