Photoshop: How do I save with a straight color instead of pre-multiplied?

  • 1
  • Question
  • Updated 6 years ago
  • (Edited)
When creating images with transparency in photoshop I would like some way to save it with a straight alpha instead of pre-multiplied. Right now I have to take the psd into After Effects and then save a frame out. Anyone know how to do this just in photoshop?
Photo of Richie Schut

Richie Schut

  • 1 Post
  • 0 Reply Likes
  • frustrated

Posted 6 years ago

  • 1
Photo of Mike Shaw

Mike Shaw, Employee

  • 79 Posts
  • 53 Reply Likes
In the File/Render Video - Render Options area, there is a popup for Alpha Channel that includes Straight - Unmatted Alpha as well as Premultiply options.
Photo of Chris Cox

Chris Cox

  • 20280 Posts
  • 813 Reply Likes
If you're saving an image - then it depends on the file format.

Photoshop normally saves straight color, but premultiplies for file formats that require it (TIFF, EXR). PSD is always straight color, no premultiplication.

Also note that there is no such thing as "straight alpha".
The transparency values are always as-is, it's the color channels that get premultiplied or not.