USE CURVES CREATIVELY
Adjust the curves of individual colour channels to get the cross-processed look
Lighten red shadows
Open Creative_start.NEF via the link below. Click the Levels and Curves panel’s Auto Contrast icon. Drag the Gamma slider to 1.48. Target the Red channel. Place an anchor point in the middle of the curve. Drag a second shadow anchor point to remap input levels of 36 to output levels of 64.
Boost midtone blues
Next, go to the Blue channel and place another anchor point in the middle of the curve. Place a point to the left of the curve and drag it so that input levels of 72 are lightened to a brighter 114. This brings out more blues in the midtones, so adjusting the look and feel of the water.