Search

1. UE4 polarized colored reflections

   

   Topic by Mik2121 · Oct 2014 · Home› Unreal Engine

   Searched but couldn't find anything. Sorry if this has been asked before (wouldn't be surprised). Also hope I got the "polarized colored reflections" term correct. How would you guys go about making this kind of reflections in UE4? In UE3 you could just simply add the colors on the specular without having to modify the…

2. Re: UE4 polarized colored reflections

   

   

   Reply by stororokw · Nov 2017 · Home› Unreal Engine

   @Christian Cunningham Not sure if you have found a solution. I started to try and create one this weekend and gathered some links that you might find useful. Uses UE4's material editor. google translate * https://blog.naver.com/PostView.nhn?blogId=daehuck&logNo=220800855171&categoryNo=34 Fake, but looks nice using Octane…

3. Re: UE4 polarized colored reflections

   

   Reply by Mik2121 · Oct 2014 · Home› Unreal Engine

   ZacD, thanks. I knew about the Newton's Rings, but I don't think that's the way all of this work (or maybe it is?). I don't really know much about the theory behind this kind of reflections. Anyway, I will see if I can get something done. Thanks!

4. Re: UE4 polarized colored reflections

   

   Reply by ZacD · Oct 2014 · Home› Unreal Engine

   I don't have much advise, but I did see a thread talking about that effect in Marmo 2. http://www.polycount.com/forum/showthread.php?p=2145719 http://en.wikipedia.org/wiki/Newton's_rings Maybe you can find some tech docs about what causes the effect and recreate it.

5. Re: UE4 polarized colored reflections

   

   

   Reply by stororokw · Nov 2017 · Home› Unreal Engine

   Following from the previous post. I fixed the issue with the noise. Unfortunately i had to go with a brute force solution and just take random samples, I found that 32 samples gives similar results, but it is still really expensive. Maybe someone knows a better way? I also did some playing around with the shader and tried…

6. Re: UE4 polarized colored reflections

   

   Reply by stororokw · Dec 2017 · Home› Unreal Engine

   I will post up the shading model when I have some time to work on this again. There are still three issues to resolve: * How to properly sample the light direction for a skylight, otherwise the shader is too expensive. * The vertex instruction count is unusually high (100+) for some reason. * How to share the code easily.

7. Re: UE4 polarized colored reflections

   

   Reply by cmc444 · Apr 2016 · Home› Unreal Engine

   This is fantastic! Thanks for sharing:smiley:

8. Re: UE4 polarized colored reflections

   

   Reply by Christian Cunningham · Nov 2017 · Home› Unreal Engine

   Trying to make something like this, I really need some help here. And the links seem to be broken. Any tips?

9. Re: UE4 polarized colored reflections

   

   

   Reply by tuxmask75 · Jan 2019 · Home› Unreal Engine

   Thanks man that's very helpful, 1 last question, in your material list was the Dinc just replaced by the FresnelBias like so? float eta_2 = lerp(1.0, eta2, smoothstep(0.0, 0.03, Dinc)); changed to: float eta_2 = lerp(1.0, eta2, smoothstep(0.0, 0.03, FresnelBias)); and than plug in a scaler paramotor? Or is that completely…

10. Re: UE4 polarized colored reflections

    

    

    Reply by stororokw · Jan 2019 · Home› Unreal Engine

    eta2 == n2 eta3 == n3 kappa = k3 If your using thickness as a parameter then trying to use Dinc is meaningless. if the thickness is 350nm then you would input 0.35 for the thickness. As far as matching up the supplementary material goes it should match the behaviour and colours. There is a limitation with using the custom…