Monogame und CustomShaders

hi,

hoffe das der richtige Forumteil...

Ich würd gern eigene Shader verwenden...
Allerdings bleibt es schwarz wo die Textur zu sein sollte.

texture = Content.Load<Texture2D>("test");
 effect = Content.Load<Effect>("plain.mgfxo");

spriteBatch.Begin(SpriteSortMode.Immediate,BlendState.AlphaBlend,SamplerState.LinearClamp, DepthStencilState.Default
,RasterizerState.CullNone, effect);

spriteBatch.Draw(texture, new Rectangle(0, 0, 543, 414), Color.White);
spriteBatch.End();

Die plain.fx Datei :

//------------------------------ TEXTURE PROPERTIES ----------------------------
// This is the texture that SpriteBatch will try to set before drawing
texture ScreenTexture;

// Our sampler for the texture, which is just going to be pretty simple
sampler TextureSampler = sampler_state
{
    Texture = <ScreenTexture>;
};

//------------------------ PIXEL SHADER ----------------------------------------
// This pixel shader will simply look up the color of the texture at the
// requested point
float4 PixelShaderFunction(float2 TextureCoordinate : TEXCOORD0) : COLOR0
{
    float4 color = tex2D(TextureSampler, TextureCoordinate);
float value = (color.r + color.g + color.b) / 3; 
    color.r = value;
    color.g = value;
    color.b = value; 
    return color;
}

//-------------------------- TECHNIQUES ----------------------------------------
// This technique is pretty simple - only one pass, and only a pixel shader
technique Plain
{
    pass Pass1
    {

      PixelShader = compile ps_5_0 PixelShaderFunction();

    }
}

Disassembly aus RenderDoc:

Shader hash 23ac371b-3a41a70e-bd3c8758-13c026a5

ps_5_0
      dcl_globalFlags refactoringAllowed
      dcl_sampler s0, mode_default
      dcl_resource_texture2d (float,float,float,float) t0
      dcl_input_ps linear v0.xy
      dcl_output o0.xyzw
      dcl_temps 1
   0: sample_indexable(texture2d)(float,float,float,float) r0.xyzw, v0.xyxx, texture0.xyzw, sampler0
   1: add r0.x, r0.y, r0.x
   2: add r0.x, r0.z, r0.x
   3: mov o0.w, r0.w
   4: mul o0.xyz, r0.xxxx, l(0.333333, 0.333333, 0.333333, 0.000000)
   5: ret

Convertiert hab ichs mit : 2MGFX.exe plain.fx plain.mgfxo /DX11

Bin da noch recht neu, erst gestern mit monogame angefangen^^ vllt hat da jemand ne idee?

Nutze : Visual Studio 2013,C#,Windows 7,Monogame/Xna,Directx