Alpha Blending

[AndreRyan]

Ive been trying to figure this out but Im not getting anywhere. How do you set up AlphaBlending AND specify the alpha values to use?

So far Ive got:

Dev.RenderState.AlphaSourceBlend = Blend.SourceAlpha
        Dev.RenderState.AlphaDestinationBlend = Blend.InvSourceAlpha
        Dev.RenderState.AlphaBlendEnable = True

But I have no idea where to set the alpha property, or whether the declaration is correct anyway, so that the geometry is rendered translucently. Im using PositionColored primitive squares.

 

[AndreRyan]

I figured it out finally, I found BlendFactor does what I want:

        Dev.RenderState.AlphaBlendEnable = True
        Dev.RenderState.SourceBlend = Blend.BlendFactor
        Dev.RenderState.DestinationBlend = Blend.InvBlendFactor
        Dev.RenderState.BlendOperation = BlendOperation.Add

        Dev.RenderState.BlendFactor = Color.FromArgb(127, 255, 255, 255)

This caused the textures to develop a white "distortion" which was countered with:

Dev.TextureState(0).AlphaArgument0 = TextureArgument.TextureColor