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How do you create a rainbow reflection material?

With specular maps not being used for special reflections anymore, how would you go about creating a material that reflected a rainbow spectrum of light, like an opal, or an abalone pearl, or holographic cards? alt text

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asked Apr 18 '14 at 12:23 AM in Using UE4

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Knobbynobbes
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Here's an example of how you could do it. Think of it as a jumping off point. The key to this example is the Dot node. You can also use the Fresnel node for similar effects.

I started with the example material M_Metal_Burnished_Steel. All those nodes are intact in the "From sample material" comment.

https://www.dropbox.com/s/rmiae0mg2e7ge8f/Screenshot%202014-04-26%2000.50.40.png https://www.dropbox.com/s/nk0i7fyj8x0zixu/Screenshot%202014-04-26%2000.54.55.png https://www.dropbox.com/s/jfgtprgflrdxq6z/Screenshot%202014-04-26%2000.55.15.png https://www.dropbox.com/s/cg80dszx2kbm3vl/Screenshot%202014-04-26%2000.55.20.png https://www.dropbox.com/s/gr92kihugm6xad5/Screenshot%202014-04-26%2000.55.27.png https://www.dropbox.com/s/l0gf8ysg5p6o9jf/Screenshot%202014-04-26%2000.55.45.png

[1]: https://www.dropbox.com/s/rmiae0mg2e7ge8f/Screenshot%202014-04-26%2000.50.40.png

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answered Apr 25 '14 at 11:07 PM

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Dieselhead
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