Step 10 Raise the full photo of the girl up through the layer stack so it sits directly beneath the two layers you created in Steps 7 to 9. You’ll have a pretty crazy effect, mixing mirrors and deconstruction.
Step 11 Select all layers and duplicate them. Select the uppermost set of layers, and go to Layer > Merge Layers. With the merged layer selected, go to Filter > Blur > Gaussian Blur. Use a Radius of 20px.
Change this layer’s blending mode to Screen, with at 80% opacity. After that go to Layer > New Adjustment Layer > Gradient Map. Use the default black and white gradient, but change the blending mode to Soft Light.
Go to Layer > New Adjustment Layer > Hue and Saturation. Reduce the Saturation to -30.
Step 12 Group all the layers except the cube pattern background. Using that background layer for reference, select some areas to hide. Once you have selected the areas, ensure you have the grouped layers selected as well, and go to Layer > Layer Mask > Hide Selection.