[vtkusers] How to get color buffer from offscreen rendering?

[LaChen]

Hi, I try to render scene by off screen.

But I can't get color buffer from the off-screen renderer.

My purpose is that I get color buffer from renderer and make it as texture.

After I get the texture, I will use it blending with another image.

If someone has advice about it, please tell me how to do this.

Thanks. 



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