Select all layers and click Command(mac)/Control PC + Alt + Shift + E to create a layer with all the layers merged in it. Go to Filter>Blur>Gaussian Blur. Use 20 pixels for the Radius. Then change the Blend Mode to Screen and the Opacity to 50%. Once again click on Command(mac)/Control PC + Alt + Shift + E to create a layer with the final design. - See more at: http://abduzeedo.com/lost-space-typography-photoshop#sthash.9JQCMJey.dpuf