I am trying to figure out how to create this rendering scenario below, but I'm not sure exactly how to go about it...
Object A- Solid object
Object B- Transparent object
Object C- Background geo
If the transparent object B travels behind object A it would act by default as expected. But if it travels in front of object A it would "subtractively render" to show through that object A, revealing whatever is behind it. (All objects would have collision so there would be no intersecting)
![alt text][1]
Would this mean a custom shader, or could this be achieved with layers alone? Any suggestions would be appreciated. Thank you.
[1]: /storage/temp/8192-subtractiverendering.jpg
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