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3D Questions about Blur effect

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Hi there,

I am working on a specific blur effect that implies several behaviours. But before I would like to know what you think about those blurring algorithms according to performances and quality :
Kawase blur, Box blur and two pass Gaussian blur.

Next are the effects I am currently working on and I would be glad to have your thoughts on those on the proper way to achieve this. Here is a schematic view followed by my questions.


  1. I would like to blur the content of those 4 spheres using the same offset no mater their position. If I apply the same blur on all objects, far object's content will appear more blurry than ones on the foreground and I want to avoid that. I think that the depth make could help but any precision would help me.
  2. If I blur the whole image and apply the result on the sphere, the white background will bleed onto the sphere shape and I want to avoid that. I also don't want that the blue (3) and yellow (4) sphere merges with the red (1) and green (2) ones. But I would like that the green and red ones merges. Again This could be done using the depth but if you have more precision about how to do it it would be interesting.

Any ideas about those questions would be helpful.

Thanks a lot.

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