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mirror

Discussion in 'Shaders' started by giulioandrea, Feb 8, 2008.

  1. giulioandrea

    giulioandrea

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    We just got PRO today. Yeah!

    And here the first question:
    is there an official way to get a pure mirror material?
    I mean a material which reflects based on the polygons normals?
    If not, do you think this is an achievable task?
    Any idea on where to start?
    Thanks
    G.
     
    giulioandrea, Feb 8, 2008
    #1

  2. Aras

    Aras

    Unity Technologies

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    In realtime graphics, there are two kinds of practical mirrors:

    1. planar mirrors; where mirror surface is a plane (or almost a plane). Conceptually this is very similar to Reflective Water in Unity Pro, just without wave distortion. There's a script+shader on the wiki for that: http://www.unifycommunity.com/wiki/index.php?title=MirrorReflection2

    2. cubemap reflections, that represent reflections that are infinitely far away. In real scenes of course, nothing is infinitely far away, but it's a good approximation. Camera.RenderToCubemap can be used here.
     
    Aras, Feb 11, 2008
    #2

  3. giulioandrea

    giulioandrea

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    thanks,
    so basically reflection on 3d surfaces are either a cube map or not possible (unless the surface is a plane)...
    oops...
    I always imagined that unity-pro was actually able to do real time reflections on 3d surfaces, for real.
    But it is my over optimistic ignorance :)

    I have tried cubemap and I get weird interpolaton artifacts between polygons...
    I need to investigate this further but it looks like the cube map is somehow smoothed at the edges... which would not happen in two non planar polygons sharing an edge...
    I will come back with a picture.

    Thanks anyway.

    G.
     
    giulioandrea, Feb 11, 2008
    #3

  4. Aras

    Aras

    Unity Technologies

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    That's just the limitation of graphics hardware. Until we get realtime raytracing everywhere, doing accurate reflections from curved objects is going to be faked.
     
    Aras, Feb 12, 2008
    #4

  5. Juan

    Juan

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    is there something new about that?


    Cheers.
     
    Juan, Jul 3, 2009
    #5

  6. antenna-tree

    antenna-tree

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    antenna-tree, Jul 3, 2009
    #6

  7. ykk

    ykk

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    can this mirror code support Unity 3.0?? I can't work on Unity 3.0. Anyone help This!!!!
     
    ykk, Oct 20, 2010
    #7

  8. ykk

    ykk

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    anyone help???? mirror script in unity 3.0
     
    ykk, Oct 29, 2010
    #8

  9. kenshin

    kenshin

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    please, could a shader guru update this shader?
     
    kenshin, Oct 30, 2010
    #9

  10. Jimmy-Bekhuis

    Jimmy-Bekhuis

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    nice, can this be ticked as static object?

    edit
    Guess not, so no occlusion possible for a mirror shaded object....?
     
    Last edited: Mar 15, 2011
    Jimmy-Bekhuis, Mar 9, 2011
    #10

  11. Somian

    Somian

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    ehrm… the first unreal in 1998 had realtime reflections :X
     
    Somian, Mar 14, 2012
    #11

  12. Zurusona-Kitsune

    Zurusona-Kitsune

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    @Somian, I'm pretty sure what they are talking about is accurate reflection.

    Like it has been said in the earlier post, using cubemap and combining with the real time mirror code for each face of the cube then projecting it onto the surface of the 3d object is one way to get real time reflection for complex object.
    I think that's how icenhancer got reflections on cars in GTA IV.
     
    Zurusona-Kitsune, Mar 14, 2012
    #12

  13. Kieran Chandler

    Kieran Chandler

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    if this is not possible, then how would you get gta-like reflections, the quality you get with the iCEnhancer, would that be done with cubemaps ?
     
    Kieran Chandler, Mar 2, 2013
    #13

  14. Lulucifer

    Lulucifer

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    I remember a guy in this forum did a screen space reflection implement, is that brn?
     
    Last edited: Mar 3, 2013
    Lulucifer, Mar 3, 2013
    #14

  15. Daniel_Brauer

    Daniel_Brauer

    Unity Technologies

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    Yes.
     
    Daniel_Brauer, Mar 4, 2013
    #15

  16. Kieran Chandler

    Kieran Chandler

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    i dont think it is because he uses directX and gta already has reflections in there
     
    Kieran Chandler, Mar 4, 2013
    #16

  17. Skibur

    Skibur

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    Just tested it out. It no longer works in Unity 4.3. Any reason why it's not working and any fixes for it soon?
     
    Skibur, Dec 31, 2013
    #17