Photoshop Tutorial - Cross Processing Effect

This tutorial will show you steps for replicating the popular cross processing effect in your own photos.
Original	Finished Image
1. We will preserve our original and perform our adjustments on separate layers . Press Ctrl-J to duplicate the background. Label the layer “Process”. 2. Duplicate the background layer again. Label this layer "Screen". 3. Select the Process layer. Convert it to smart object to allow processing in LAB mode and full use of RGB effects in our main document. 4. Double click to edit smart object and change to LAB color. Image Mode>LAB color 5. Ctrl 3 to select the L channel only.
	6. Apply and Unsharp mask to the L channel. (Filter>Unsharp mask) The values shown below were used for this image.
7. Press Ctrl 2 to exit L channel and return to full channel composite of image.
8. Open a curves adjustment layer. In the Curves dropdown select the A channel. Create a point at output 63,input 63 on the graph. With the point selected, drag to or input the values of output 40, input 63
	9. Select the B channel in the dropdown. Create a point at output - 63,input - 63 on the graph. With the point selected, drag to or input the values of output -84 , input -91. For flexibility in your own images you can drag your points in the same general area and adjust based on your view.
10. Close and save Process.psb, return to working PSD. 11. Select layer previously named “Screen”. 12. In the channels panel, locate the channel that has the most contrast, in the image chosen this is the red channel. 13. Ctrl+Click the Red channel. Apply a layer mask to the screen layer. This will apply the red channel to the layer mask. Next we will add texture. I used brushes found at http://www.obsidiandawn.com/grungy-dirty-photoshop-gimp-brushes but your favorite grunge brush will do. 14. Select a high resolution brush. You want to enlarge the brush so that one click covers the entire canvas. Select a midrange neutral color from the image itself using the eyedropper. I used #b3c376. We could paint directly onto a new layer, but for greater control we will create new color fill using the color we selected. Select the layer mask for the color fill and invert (Ctrl+I). Using the grunge brush and white selected, click once over the entire canvas with the mask selected. 15. Change the blending mode of this layer to Soft Light. The opacity should be brought down somewhere between 40-60% based on preference. Since the layer is a color fill the saturation can also be increased or decreased to preference by adjusting the S level in the color dialogue. 16. Next we will create a vignette. Create another solid color fill selecting a lighter color from the background. Here I used #b0d996. Using the elliptical marquee tool, create a round selection covering much of the canvas. Select the layer mask for the color fill and fill with black. 17. Filter>Gaussian Blur at 100 pixels and set the layer to multiply. Opacity is best between 80% and 100% And that is it.
Final Result
Steps repeated on alternate image found at http://www.sxc.hu/photo/792110 I adjusted the B channel to -84 , -65 and selected the blue channel for the “screen” layer mask
DuJuan Sylvester DuJuanSylvester.com