Expand the texture in such a way so you will have a large area that you can use for any purpose. Duplicate this layer when you need it. Now make a selection of the left side of the building; this will be set apart from the rest of the building. Duplicate the selection and drag it a little towards the left.
Because the wall is located towards the edge of the working area, the entire building will have to move. Select all layers above the group and move these over. Apply a layer mask to the building; make a selection of the left, only this time the bottom pillar will stay in one piece. Remove the left side inside the layer mask as per the screenshot.
Duplicate the left side and go to Edit>Transform>Flip Horizontal. Hit Cmd/Ctrl+T for Free Transform and partially flip the new side to place it against the other side. Go to Edit>Transform>Perspective to correct the perspective. Create two new sides on top of the new side. Ctrl/right-click the new layers and choose Create Clipping Mask – these will be the shading layers.
Set the bottom layer of the two Clipping Mask layers to Soft Light blending mode and open the Brush tool. Setting the Foreground Color to Black, Size to 1000px, Hardness to 0 and Opacity to 10%, brush the side several times until you see a change in colour. Go to the top layer and create the shadow using the same method.
For use of the texture we will first remove a portion of the right side of the building. Create a selection of the part that will be removed and remove this using the layer mask of the layer. Turn off the original layer of the building and then place the texture. It’s that simple.
Go to Edit>Transform>Perspective and modify the texture. A convenient aid for this is the cement lines between the bricks to decide how the perspective should work. Modify the entire building in terms of shading and untidy edges until you reach the glass tower. To modify this specifically we will use the glass as a texture.
Select the glass frames and duplicate these. Make sure the frames align with the bottom of both sides by using Free Transform (T) and Edit>Transform>Perspective. Place a clipping mask on top of the layer and set the blending mode to Overlay, then use the Brush tool on the window to darken the glass.
Select all layers that have been made after the grouping and group these via Cmd/Ctrl+G. Create a new layer and select the Gradient tool. Change the gradient to Transparent Rainbow and make a gradient from the top right to the bottom left. Set the layer to Overlay blending mode, Opacity 5%.
Create a new layer and select the Brush tool (Foreground Color White, Size 700px, Hardness 0% and Opacity 15%). Set the layer to Overlay and the Opacity to 80%. Now brush over the front glass tower to light it up. Create a new Gradient Map adjustment layer: Foreground to Background, Overlay blending mode and Opacity 65%.
Create a new adjustment layer using Brightness/Contrast, with the settings at: Brightness -23, Contrast 10. Then add a Photo Filter adjustment layer: Warming Filter (LBA), Density 50%. Finally add a Curves layer, creating two new points. For the first point, go to Output 36, Input 40; for the second point set Output 71, Input 67. Go back to the bottom layer and apply a layer mask to the original building. Duplicate this layer several times and flip/turn the layers.
Try to fill up the sky without creating repetitive patterns in the image. Use the layer mask to smooth out the rough edges. Go to the top layer and use Cmd/Ctrl+A. Then use Shift+Cmd/Ctrl+C and Cmd/Ctrl+V for a new merged layer. Go to Filter>Sharpen>Smart Sharpen with settings of Amount 100% and Radius 1.0px. Set the Opacity of this layer to 40%.