Hello guys,
I need an Iridescence shader for my game. Does anyone can make one? I will pay for it.
Regards,
Carlos
The simple way would be to have a lookup texture for the Fresnel to do that. That would work on static surfaces. For something like a soap bubble it’s a bit more complex though.
Then you can manually create a lookup texture or actually generate one which is a bit more tricky:
My opinion is still that Unity should offer this out of the box in the standard shader. The simple option to have a lookup texture for Fresnel allows for better approximations for things like metals and adds the option for the average artist to add iridescence.
This also means that the Unity lighting system should actually respect the values in the g-buffer. Whether or not you want to create a PBR base, you should leave this part up to the shader. The shader should output the amount of diffuse and reflection in a PBR way and the lighting calculations should follow this as is. (Currently Unity also adds reflections to surfaces that output 0 reflection/specular in the g-buffer.)
I need this shader for fish, so it most be able to perform in dynamic objects that have animations. I don’t have any knowledge about shaders, so I am offering to pay for someone to make the shader.
Regards,
Carlos
I stumbled across Iridescence Thin Film | VFX Shaders | Unity Asset Store while searching for something similar, but I am not affiliated with the author and have not tested it.
I have a character that has the “blue black” hair that appears relatively blue in light and almost pitch black out of it. I was looking for a shader to create that effect. This one appeared to be a bit more focused on appearing metallic.
2 Likes
Give this one a whirl.
Shader "Toon/Iridescent" {
Properties{
_Color("Main Color", Color) = (0.5,0.5,0.5,1)
_MainTex("Base (RGB)", 2D) = "white" {}
_Noise("Noise (RGB)", 2D) = "white" {} // noise texture
_Ramp("Toon Ramp (RGB)", 2D) = "gray" {}
_IrTex("Iridescence Ramp (RGB)", 2D) = "white" {} // color ramp
_IrColor("Ir Color", Color) = (0.5,0.5,0.5,1)// extra iridescence tinting
_Offset ("Iridescence Ramp Offset", Range (0, 1)) = 1 // offset of the color ramp
_Brightness ("Iridescence Opacity", Range (0, 1)) = 1 // opacity of iridescence
_WorldScale ("Noise Worldscale", Range (.002, 5)) = 1 // noise scale
[Toggle(LM)] _LM("Use Lightmap UVS?", Float) = 0 // use lightmap uvs instead of normal ones
}
SubShader{
Tags{ "RenderType" = "Opaque" }
LOD 200
CGPROGRAM
#pragma surface surf ToonRamp
#pragma shader_feature LM
sampler2D _Ramp;
// custom lighting function that uses a texture ramp based
// on angle between light direction and normal
#pragma lighting ToonRamp exclude_path:prepass
inline half4 LightingToonRamp(SurfaceOutput s, half3 lightDir, half atten)
{
#ifndef USING_DIRECTIONAL_LIGHT
lightDir = normalize(lightDir);
#endif
half d = dot(s.Normal, lightDir)*0.5 + 0.5;
half3 ramp = tex2D(_Ramp, float2(d,d)).rgb;
half4 c;
c.rgb = s.Albedo * _LightColor0.rgb * ramp * (atten * 2);
c.a = 0;
return c;
}
sampler2D _MainTex;
sampler2D _Noise; // noise
sampler2D _IrTex; // color ramp
float4 _Color;
float4 _IrColor; // extra tinting
float _Offset; // color ramp offset
float _Brightness; // Iridescence opacity
float _WorldScale; // noise scale
struct Input {
float2 uv_MainTex : TEXCOORD0;
float2 uv2_Noise : TEXCOORD1; // lightmap uvs
float3 viewDir; // view direction
};
void surf(Input IN, inout SurfaceOutput o) {
half f = 1 -dot(o.Normal, IN.viewDir) + _Offset; // fresnel
half4 n = tex2D(_Noise, IN.uv_MainTex * _WorldScale); // noise based on the first uv set
#if LM
n = tex2D(_Noise, IN.uv2_Noise * _WorldScale); // noise based on the lightmap uv set
#endif
half4 c = tex2D(_MainTex, IN.uv_MainTex ) * _Color;
half3 i = tex2D(_IrTex, float2(f,f)+ n).rgb * _IrColor; // iridescence effect
o.Albedo = (c.rgb) + ((i * n) * _Brightness); // multiplied by original texture, with an opacity float
o.Alpha = c.a;
}
ENDCG
}
Fallback "Diffuse"
}
Try it out with the color ramp.
This shader is from x.com and i believe their is a patreon page if you wish to donate.
1 Like
Thank you LoungeKatt and Subliminum,
Both reply are very helpful! I will check that shader from Subliminum and the asset store one. I appreciate very much your help in this matter. I will let you know how it goes.
Regards,
Carlos
2 Likes
Also
1 Like
Subliminum, I checked the shader Toon/Iridescent, but as the title says it the shader doesn’t have any specular, and other properties, so it is not practical for a realistic graphics game. The one in the assets store look very good indeed, I think I will go with that for my game.
neoshaman, that tutorial is very interesting, but I am working in all aspects of my game and don’t have time to learn about shaders really. Thank you for the link, it was very interesting read.
Regards,
Carlos
Yea if you want to save a few bucks just put the code relating to iridescence into unitys standard shader which has specular and detail maps etc. I cannot recommend learning shaders enough if you end up with the spare time. Good luck with the project!
I would love to learn shader programming but I am in a tight deadline with the Xbox One folks so I really can’t at least for this game, but you can be sure I will as soon as I have a down time. I think it is one of the most important knowledge to have if you want to create a nice looking and fast fps game. Anyways thank you for your input, very appreciated.
Regards,
Carlos
Seyed_Morteza_Kamaly,
I appreciate very much you offering a shader for free. The problem that the shader I am looking for most have specular, smoothness, and the other properties of the standard Unity shader. To be more clear I need this shader to create realistic fish skin, like Tuna, Jacks, Barracudas, etc… This type of fish’s skin are Iridescent. But your offer is very nice.
Regards,
Carlos
Hi Dear Friend I added Surface Shader to my repository
some new properties
BumpMap
BumpPower
Metallic
Glossiness
Hue
Saturation
Brightness
Contrast
3 Likes
@Seyed_Morteza_Kamaly Thanks for sharing, looks really nice. Any change to add license, that allows us to use it in our games?
I’ll do it…It’s free to use
2 Likes
Thx
@Seyed_Morteza_Kamaly ,
Thank you so much!! This is perfect brother, exactly what I was looking for! I tested last night and it works perfectly. I appreciate it very much, thanks a bunch!
Regards,
Carlos
2 Likes
It was my pleasure to help you.
I Added Anisotropic Iridescence
3 Likes