Photoshop: Inconsistent Scaling between layers and background (transparency)

  • 1
  • Problem
  • Updated 6 years ago
  • Not a Problem
  • (Edited)
I noticed something inconsistent with Photoshop CS6 (current version I use at work). When you have a design on its own layer (not the Background layer) and scale it down, say 50%, using the default scaling options, it will create 1px semi-transparent border. But, if this same design is flattened and the Background, it will scale with a clean cut edge. The example image shows the top method being clean cut while the bottom method shows the 1px semi-transparent border. I believe the top method is the correct consistent approach.

Photo of Ray Rose

Ray Rose

  • 1 Post
  • 0 Reply Likes

Posted 6 years ago

  • 1
Photo of Chris Cox

Chris Cox

  • 20280 Posts
  • 823 Reply Likes
That's because you're scaling a layer, and the layer has transparency, specifically it has transparency outside of it. The bilinear and bicubic resampling kernels will blend some of that outside transparency with the edge values.

This is not a bug, just the nature of math.

So if you're going to resize the image and care about edges, flatten first.