Black Rectangle instead of texture

Question

I am trying to draw a textured ractangle like in this example. But instead of a texture the rectangle is just black.

Draw method:

protected override void Draw(GameTime gameTime)
{
    GraphicsDevice.Clear(Color.CornflowerBlue);

    effect.EnableDefaultLighting();
    effect.World = world;
    effect.Projection = camera.Projection;
    effect.View = camera.View;
    effect.TextureEnabled = true;
    effect.Texture = grass;
    effect.LightingEnabled = true;

    foreach (var pass in effect.CurrentTechnique.Passes)
    {
        pass.Apply();

        GraphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.TriangleList, quad[0].Vertices, 0, 4, AlignedQuad.Indexes, 0, 2);
    }

    base.Draw(gameTime);
}

The effect is like a in the example a BasicEffect. The texture is existing and is not a black rectangle.

What am I missing or doing wrong? Thank you for your help.

Answer 1

Try adding effect.Alpha = 1f; The alpha channel was probably premultiplied (check the texture properties in your content section).