Dark areas in Sphere with Cubemap…

Troubleshooting graphics
1

Does anyone knows why happen this?

Shader:

[java]MaterialDef Cube Texture {
MaterialParameters {
TextureCubeMap Texture
Vector3 CameraPosition
Boolean SphereMap
}
Technique {
VertexShader GLSL100 : Shaders/Reflection/Reflection.vert
FragmentShader GLSL100 : Shaders/Reflection/Reflection.frag

    WorldParameters {
        WorldViewProjectionMatrix
        WorldMatrix
        NormalMatrix
        CameraPosition
    }

    Defines {
        SPHERE_MAP : SphereMap
    }
}

}
[/java]

reflection.vert
[java]uniform mat4 g_WorldViewProjectionMatrix;
uniform mat4 g_WorldMatrix;
uniform mat3 g_NormalMatrix;
uniform vec3 m_CameraPosition;

attribute vec3 inPosition;
attribute vec3 inNormal;

varying vec3 m_Reflection;

void main()
{
vec3 Normal = g_NormalMatrix * inNormal;
vec4 Position = g_WorldMatrix * vec4(inPosition,1.0);
m_Reflection = reflect(Position.xyz - m_CameraPosition, normalize(Normal));
m_Reflection = vec3(m_Reflection.x, -m_Reflection.yz);
gl_Position = g_WorldViewProjectionMatrix * vec4(inPosition, 1.0);
}[/java]

Relfection.frag
[java]uniform samplerCube m_Texture;

varying vec3 m_Reflection;

void main()
{
gl_FragColor = textureCube(m_Texture, m_Reflection);
}[/java]

[java][/java]

2

Why happens what?

3

The dark areas in the sphere. When I move away from the sphere, it is more dark.

4

It’s important that your cameras position for rendering the cubemap is the center of the sphere.

5

The sphere and the camera are in vec3(0,0,0) location

6

what does your individual textures looks like?

7

Sorry, I can´t understand your question, Can you explain me what you say?

I’m sorry, I know my english is a little bad