ios – My clear texture photos are look black in my Steel render

I’m utilizing following pipelineDescriptor and shader fragments.

I encountered an issue which I couldn’t discover answer for.

My textures photos match high-quality seems to be nice besides clear ones.

Clear elements (Alpha = 0) of my photos seems to be black on machine display as a substitute of
clear.

Additionally, depthStencilDescriptor.isDepthWriteEnabled = true
depthStencilDescriptor.depthCompareFunction = .much less

func buildPipelineState(machine: MTLDevice) -> MTLRenderPipelineState {
    
    let library = machine.makeDefaultLibrary()
    let vertexFunction = library?.makeFunction(title: vertexFunctionName)
    let fragmentFunction = library?.makeFunction(title: fragmentFunctionName)
    
    let renderPipelineDescriptor = MTLRenderPipelineDescriptor()
    renderPipelineDescriptor.colorAttachments[0].pixelFormat = .bgra8Unorm
    
  
    renderPipelineDescriptor.colorAttachments[0].isBlendingEnabled = true
    renderPipelineDescriptor.colorAttachments[0].rgbBlendOperation = .add
    renderPipelineDescriptor.colorAttachments[0].alphaBlendOperation = .add
    
    renderPipelineDescriptor.colorAttachments[0].sourceRGBBlendFactor = .oneMinusBlendAlpha
    renderPipelineDescriptor.colorAttachments[0].sourceAlphaBlendFactor = .sourceAlpha
    renderPipelineDescriptor.colorAttachments[0].destinationRGBBlendFactor = .oneMinusSourceAlpha
    renderPipelineDescriptor.colorAttachments[0].destinationAlphaBlendFactor = .oneMinusSourceAlpha
    
    renderPipelineDescriptor.depthAttachmentPixelFormat = .depth32Float
   
    renderPipelineDescriptor.vertexFunction = vertexFunction
    renderPipelineDescriptor.fragmentFunction = fragmentFunction
    renderPipelineDescriptor.vertexDescriptor = vertexDescriptor
    
    var renderPipelineState: MTLRenderPipelineState! = nil
    
    do {
        
        renderPipelineState = strive machine.makeRenderPipelineState(descriptor: renderPipelineDescriptor)
        
    } catch let error as NSError {
        
        Swift.print("(error)")
    }
    
   return renderPipelineState
    
}



fragment half4 basic_fragment_function(VertexOut vIn [[ stage_in ]],
                                    fixed Mild &mild [[ buffer(1) ]]){

  float4 coloration = vIn.coloration;

  return half4(coloration);

}



 fragment half4 textured_fragment_function(VertexOut vIn [[ stage_in ]],
                                    fixed Mild &mild [[ buffer(1) ]],
                                    sampler sampler2d [[ sampler(0) ]],
                                    texture2d<float> texture [[ texture(0) ]]){

  float4 coloration = texture.pattern(sampler2d, vIn.textCoors);

  return half4(coloration);

}