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Window Rain Distortion?

I've been trying to create a rain distortion on a window in my project, but I can't seem to achieve it in a material. Could anyone help out?

Thanks.

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asked Apr 24 '15 at 11:54 PM in Rendering

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Edkenway
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2 answers: sort voted first

If you are trying to make something like this you need a mask(black&white texture) and normal map for droplets, and use the mask for refraction input. To go byond that with running droplets you could use a flipbook texture in addition to static droplets. That's how i made it in that video.

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answered Apr 25 '15 at 12:01 AM

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Jacky
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avatar image Edkenway Apr 25 '15 at 02:41 AM

Would it be possible for you to post a screenshot of your material?

avatar image Jacky Apr 25 '15 at 02:56 AM

I'm afraid not, not yet anyway. It isn't anything complex but just too messy to share right now. The current version also has dynamic droplets hitting the window, which makes things a bit more crowded. I will share it in the forums sometime in the future though.

avatar image Edkenway Apr 25 '15 at 04:29 PM

Ok, so I was able to get a normal map and a mask, but I'm not sure what to do next. Here's an image of the material: alt text

rain.png (389.7 kB)
avatar image Jacky Apr 25 '15 at 05:53 PM

In it's most basic form, you need to do something like this:

alt text

You can increase the tiling by plugging Texture Coordinate nodes to the textures.

refrack.jpg (84.9 kB)
avatar image Edkenway Apr 25 '15 at 06:13 PM

Great! Worked out perfectly with my textures, thanks a lot for the help :)

avatar image Rajuk Oct 07 '15 at 12:27 AM

I would curious how you create the texture for the droplets ....

avatar image Jacky Oct 07 '15 at 01:36 AM

You need to find one on google or create it in a modeling program. Creation isn't a simple process i can explain here unfortunately and each program has different workflows so you'll have to find a tutorial on your program's particle effect tools.

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I released a material on the market that do exactly what you need. It can be applied to refractive surfaces and has a post process option. Check this link out:

https://www.unrealengine.com/marketplace/animated-rain-waterdrop-material

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answered Oct 21 '18 at 08:50 AM

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Blockmind
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