Join Seán Duggan for an in-depth discussion in this video Creating a star-comet effect, part of Enhancing Night and Low-Light Photos with Photoshop.
…Once you've created a layer stacked, star trail effect,…such as in this image, there's another interesting effect that you…can apply that will create the look of a sky filled with streaking comets.…Obviously, this is not something you would do on every star image, but…once in awhile, it's kind of fun.…So, we're going to start with the bottom layer in the stack being active.…And to do this, you're going to rely on a couple of…keyboard shortcuts that you're going to apply over and over again.…It's a little bit repetitive, and…if you have a lot of layers in the file, it could take a little bit of time.…
So the shortcut you first need to know is Opt + which would be Alt + on Windows.…And look what that just did.…That selected the previous layer in the stack, so…option right bracket goes up and selects the previous layer.…So you're going to be doing this over and over again, but knowing the shortcuts…will make it a faster process than if you had to move the mouse to select the layer.…So now that I've selected the next to the last layer in the stack,…
In this course, photographer and educator Seán Duggan explores a range of post-processing techniques aimed at expanding your creative options for night and low-light photography—and even "shooting" stars. He'll begin in Camera Raw for general enhancements (white balance, tonal and contrast adjustments, and noise reduction) and then turn to Photoshop to capitalize on its Merge to HDR feature, which can create spectacular high-dynamic-range images. Last, he includes techniques specifically for star photography: stacking layers to create star trails, removing and replacing blurry stars, and using luminosity masks on photos of the Milky Way.
- Using neutral guides to set white balance
- Applying lens profile corrections
- Reducing noise
- Working with 16-bit and 32-bit HDR images
- Stacking layers and combining exposures
- Improving star photography