Old Building Photoshop Effect Tutorial

[1]-First of all Open Any image with the help of Ctrl+O as I did take following image

[2]-Now make the Duplicate Layer & then go to Layer>New Adustment Layer>Channel Mixer
Photoshop Technique-How to use the Channer Mixer features like I have used this

href="http://tutorialtown.com/wp-content/uploads/2008/06/pun499-old-building-photoshop-effect-tutorial2.gif">

[3]-Now your image should look like as shown below

[4]-Now Open Other image as I did take following image of Clouds & adjust in First image with the help of Move Tool

[5]-Now Blending Mode of this Layer should ‘Color Dodge’ & your Layer Pallete should look like as shown below

[6]-Thanks for read this Photoshop Tutorial.I hope U have learnt some Photoshop Techniques & the Final Output of this Tutorial
is shown below