Results 1 to 9 of 9

Thread: Diamond or polylight

  1. #1
    Registered User bracki7's Avatar
    Join Date
    Mar 2009
    Location
    Poland
    Posts
    107

    Diamond or polylight

    Hi!
    I have a question. I have to do a rotating cup with three diamonds in the ear cup. Background is black and only one spotlight above. The main question is - why the diamonds don't sparkle?



    Support question: how (if this a way) convert diamonds to a polylights?

    Support question 2: how to setup of diamond to get high level of sparkle when they are closest to camera? Probably by transparency/gradient/Distance to camera in texture Editor tab, but i don't know settings.

    Support question 3: it is possible to get an effect a... hmm when the spotlight is above of cup I see only a white circle on the let say, ground. And it is good. But I want to get an effect of a slightly smoky space in which the beam can be seen? I hope You understand me )
    But that something is obvious does not mean that it is true.

  2. #2
    Space Monkey 3DGFXStudios's Avatar
    Join Date
    Sep 2005
    Location
    Earth
    Posts
    3,121
    Add some reflection to your scene. Or put a reflection map in the reflection surface properties. Or render in with a nice HDRI in the environment.

  3. #3
    Registered User bracki7's Avatar
    Join Date
    Mar 2009
    Location
    Poland
    Posts
    107
    There is reflection. In environment tab is ray tracking+spherical map and in backdrop tab is image world map.
    But that something is obvious does not mean that it is true.

  4. #4
    Professional enemy shill clagman's Avatar
    Join Date
    May 2007
    Location
    Huntsville, Alabama
    Posts
    1,162
    I'm thinking it has a lot to do with transparency/refraction and lack of bright objects in the scene. Try some HDR environments maps and turn on transparency and put the IOR to 2.4 (or whatever starts to look right). It looks as if the diamond objects are opaque, reflection alone cannot do the job. You could also do some dispersion (refraction and specular/reflection) to help but you will have to setup a node based material for this.
    Seeing the glass as half empty is being an optimist when the glass is full of urine

  5. #5
    Super Member dwburman's Avatar
    Join Date
    Feb 2003
    Location
    Washington State, USA
    Posts
    2,880
    Also, If you ever go to a jewelry store, look at the lighting. They usually have a lots and lots of small lights around the cases. They probably do that so the shiny, reflective, refractive surfaces have lots of things to reflect/refract so they sparkle more.

    One big light won't do it.

    http://gb.fotolibra.com/images/previ...e-display.jpeg
    [mr] Dana W. Burman | http://dwburman.com
    Motion Graphics for sale at Pond5 Stock Footage
    Check out my tutorials at Liberty3d.com & my YouTube channel!

  6. #6
    Make the 'back' of the Diamonds have a metal finish, so there's more surfaces which will reflect highlights.

    Also go into the diamond material settings and add some refraction and reflection dispersion to it. You will need to have some reflection blur/refraction blur in the settings, even if it's only a tiny a value, and use a shader which supports it. Either use the built in Reflection/Refraction node shaders, or use Dielectric, which is simpler. Also make sure you give the Diamond a high enough IOR/refraction index (Diamond has an IOR of 2.417) So that the rays are correctly dispersed round the material. That should make your reflections sparkle more!

    Also to get the coloured highlights, make sure you add something very bright and white (luminosity of at least 300%) or all you will get is some Specular highlights, which don't do colour dispersion effects.

  7. #7
    Super Member
    Join Date
    Feb 2003
    Location
    Hamburg
    Posts
    1,571
    Quote Originally Posted by bracki7 View Post
    There is reflection. In environment tab is ray tracking+spherical map and in backdrop tab is image world map.
    Ray tracing + spherical map doesn't reflect the backdrop, you need ray tracing + backdrop.

  8. #8
    LW vidz   DPont donate   LightWiki   RHiggit   IKBooster   My vidz

  9. #9
    Registered User
    Join Date
    May 2003
    Location
    Sweden
    Posts
    312
    I would use HDRI for environment/reflectionmap. Render a test and save in some HDR format. Make a composition in AE or some other application of choise. Duplicate the rendered layer and press the contrast way up, so you only get the brightest pixels (that correspond to the highlights) and blur that layer a bit and set the blendmode to something like screen.

    Quick and easy way to get a Bloom like effect.
    9.6

    Need i say more ?
    Yes, soon we'll have core!
    L8est reel: http://www.youtube.com/watch?v=9NnXaP121WQ

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •