overlapping normals in unity shaders?

zombie420

I new to unity shaders and have some materials and want to create a wet effect. Not necessarily a panning UV rain effect, this is post-rain, but rain droplets and all that jazz. How can I combine two normals in a shader?

Froyok

I suggest reading this : http://blog.selfshadow.com/publications/blending-in-detail/

zombie420

Froyok said:

I suggest reading this : http://blog.selfshadow.com/publications/blending-in-detail/

Appreciate the help but perhaps I should have been more clear; this is going to be a rain texture applied to multiple materials already created in a game. I could adjust the normals to every texture in the game but I'm hoping for a much quicker solution, like overlapping normals in a unity shader

Froyok

Well, this is exactly what my link is explaining : how to blend two normal maps (two separate texture file) together in a shader. The article describes different maths that you can implement in a custom Unity shader.

zombie420

Ahh sorry, I opened your link and immediately shrugged it off, thinking it was the normal combine script.

With that said, a lot of this is over my head. I confess code and math are not my strengths and perhaps it behooves me to just grab help from a tech artist. But are you aware of a unity shader that has two normal inputs? Or can I open a shader, like in UE4, and just combine them with a blending node and plug that into the "normal" input?