Hello forum!
So, I found a great billboard GLSL shader at this link, I made some little changes, and it works perfectly on OSX and iOS to suit my needs. In this demo I made, I used this shader to render some fake 3D boxes.
As you can expect, it doesn’t show on Windows machines since it’s GLSL… So I would like to ask if someone can help me converting it in any other type, so everyone can see the above demo without glitches.
Thanks to whose willing to help. 
Here it is my shader:
Shader "Billboard" {
Properties {
_Color ("Main Color", Color) = (1,1,1,1)
_MainTex ("Texture Image", 2D) = "white" {}
}
SubShader {
Pass {
Cull Off
GLSLPROGRAM
uniform sampler2D _MainTex;
uniform vec4 _Color;
uniform vec4 _MainTex_ST;
varying vec4 textureCoords;
varying vec4 color;
#ifdef VERTEX
void main()
{
gl_Position = gl_ProjectionMatrix
* (gl_ModelViewMatrix * vec4(0.0, 0.0, 0.0, 1.0)
+ vec4(gl_Vertex.x, gl_Vertex.y, 0.0, 0.0));
textureCoords =
vec4(gl_Vertex.x + 0.5, gl_Vertex.y + 0.5, 0.0, 0.0);
color = vec4(_Color.r - 0.5, _Color.g - 0.5, _Color.b - 0.5, 1.0);
}
#endif
#ifdef FRAGMENT
void main()
{
gl_FragColor = texture2D(_MainTex , _MainTex_ST.xy * vec2(textureCoords) + (_MainTex_ST.zw));
if (gl_FragColor.a < 0.5)
{
discard;
}
gl_FragColor += color;
}
#endif
ENDGLSL
}
}
}
