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Continue duplicating this layer and go to Filter > Liquify and use the Forward Warp Tool (W) to tweak the nebula area as the screenshot below shows.
Move this part onto the head of the model to make it as a flow of light and remove the hard edges using its layer mask.
Create a group for these space layers and change the group's mode to Screen 100%. Add a Hue/Saturation adjustment layer to change the color of the effect.
Make a Color Balance adjustment layer and alter the Midtones settings:
Create a Levels adjustment layer to increase the visibility of the effect on both sides of the canvas. Paint on the rest so it won't be affected by this adjustment layer.
Open the abstract background image and use the Rectangular Marquee Tool to take a part on the right of the image to drag into our working document. Go to Filter > Liquify Tool and select the Forward Warp Tool to bend this abstract part and place it besides the left of the model's eyes (from the viewer). Change this layer mode to Linear Dodge 100%.
Take other parts from the abstract image to add to the background. Use the Liquify Tool to tweak some of them into different forms and change their layer mode to Linear Dodge 100%.
Create a group for the abstract layers and change the group's mode to Linear Dodge 100%. Add a Hue/Saturation adjustment layer to desaturate the abstract details completely.
Add a mask to this group and use a soft black brush with the opacity about 30% to reduce the abstract visibility.
Place the nebula texture 1 onto the model and use Ctrl+T with the Warp mode to tweak it as shown below:
Change this layer mode to Screen 100% and use a layer mask to remove the hard edges and reduce the texture's visibility on the model's face.
Duplicate this layer twice and arrange around the first one a bit. Use their layer mask to remove the part on the face of the model.
Create a group for these nebula layers and change this group's mode to Screen 100%. Add a Levels adjustment layer to remove the hard edges of the effect.