Finnaly the depth buffer is working with mass effect 3. I also used SSR and MXAO shaders from Quint shader set.
I didn't rewrite the shader, just found it on this forum and tweaked it to work with ME3, As soon as I find the thread I will credit the the creator.
In the video and some screenshots you can see SSR (screen space reflections), it isn't perfect, but it adds some nice reflections in in some angles. The downside is that it adds reflections on all surfaces. But the depth buffer works flawlessly. Also works with ME2.
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