HDR class exercise: Inside Out

I took 3 photographs with different exposure of my flat with a view from the window and combined them with Photomatix Pro:

_MG_1471_MG_1472_MG_1473and I have obtained this:

_MG_1471_2_3_fused.jpeg

However, I found the couch being still too dark so I decided to combine the final HDR image with the high exposure photograph where the couch is much brighter. And I have done this manually in Photoshop CS6:Screen Shot 2013-04-09 at 2.41.09 PM

Screen Shot 2013-04-09 at 2.40.22 PM

Using masking layers I obtained this:

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