Emissive Material in Unity - unity3d

Question

I am trying to make that a sphere emits light by using a material from the own unity, but no light is being created or emitted. What is wrong?

Answer 1

You can modify the emission in the material, without any special shader
You can then switch off all lights in the scene and you will be able to still see this GameObject
You can test it adding a script that make the ambient light to be dark grey
void Start () {
Color myColor = new Color32( 0x0B, 0x0A, 0x0A, 0xFF );
RenderSettings.ambientLight = myColor;
}
The result would be something like this, a cube which emit yellow light and a cube which is almost in darkness
Now if you want (which I am still not sure) to iluminate other elements in the scene. You should select the object as static in the right top corner.
And the result would be:
If this solution still does´t work for you. You can try with shaders:
Create a new Shader, name it Glow and replace its default code by this:
Script
Shader "Glow" {
Properties {
_MainTex ("Texture", 2D) = "white" {}
_Color ("Color", Color) = (1,1,1,1)
_Glow ("Intensity", Range(0, 3)) = 1
}
SubShader {
Tags { "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" }
LOD 100
Cull Off
ZWrite On
Blend SrcAlpha OneMinusSrcAlpha
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
sampler2D _MainTex;
half4 _MainTex_ST;
fixed4 _Color;
half _Glow;
struct vertIn {
float4 pos : POSITION;
half2 tex : TEXCOORD0;
};
struct v2f {
float4 pos : SV_POSITION;
half2 tex : TEXCOORD0;
};
v2f vert (vertIn v) {
v2f o;
o.pos = mul(UNITY_MATRIX_MVP, v.pos);
o.tex = v.tex * _MainTex_ST.xy + _MainTex_ST.zw;
return o;
}
fixed4 frag (v2f f) : SV_Target {
fixed4 col = tex2D(_MainTex, f.tex);
col *= _Color;
col *= _Glow;
return col;
}
ENDCG
}
}
}
Create a Material
Change its color to what you want and the Shader type select Glow
(the one you created in the fist step). Also choose the intensity you prefer.
The result would be:
With this version, you can not iluminate the nearby objects.
Finally, to make a better glomming effect you can add some effects to the camera.
Go to Assets -> Import Package -> Effects
Select the Main Camera and Add Component: Image Effects -> Bloom and
Glow -> Bloom Optimized
You will have the following component in your camera:
And the result of adding this effect to the camera would be:

Answer 2

The problem was solved only checking all objects in the scene as Static!