Well I'm not sure how to set this up so it does basic blending it which the two objects are blended based on there alpha and not there colors. This is the closest I've come from trying random things: ID3D10BlendState* BlendState = NULL; D3D10_BLEND_DESC BlendStateDesc; ZeroMemory(&BlendStateDesc, sizeof(D3D10_BLEND_DESC)); BlendStateDesc.AlphaToCoverageEnable = false; BlendStateDesc.BlendEnable[0] = true; BlendStateDesc.SrcBlend = D3D10_BLEND_SRC_ALPHA; BlendStateDesc.DestBlend = D3D10_BLEND_ONE; BlendStateDesc.BlendOp = D3D10_BLEND_OP_ADD; BlendStateDesc.SrcBlendAlpha = D3D10_BLEND_ZERO; BlendStateDesc.DestBlendAlpha = D3D10_BLEND_ZERO; BlendStateDesc.BlendOpAlpha = D3D10_BLEND_OP_ADD; BlendStateDesc.RenderTargetWriteMask[0] = D3D10_COLOR_WRITE_ENABLE_ALL; g_d3dDevice->CreateBlendState(&BlendStateDesc, &BlendState); g_d3dDevice->OMSetBlendState(BlendState, D3DXCOLOR( 0.0f, 0.0f, 0.0f, 0.0f ), 0xFFFFFFFF); But it is adding the color to the destination and I want it to blend it by just the alpha and not the color.

Quote:Original post by Adam_42
You want inverse source alpha for the dest blend.

Thanks!