Linear Gamma RGB Color Space

[SomeGuyNamedDavid]

Blurring or blending between two colors tends to result in colors in the middle that are too dark. In Photoshop, there's a setting called "Blend RGB Colors Using Gamma" which solves this blending issue. In GIMP, I've heard some talk about a similar solution, but have not been able to find clear instructions on how to do it.

This video talks more specifically about what exactly the problem I'm looking to solve is. (The relevant bit starts at 2:17.)

[Ofnuts]

AFAIK Gimp 2.8 (which is limited to 8-bit precision works in "perceptual mode" which include Gamma. The next version (2.10, once finalized, but right now you can use 2.9.5, the "developer" version, if you are brave enough) can work on 8/16/32 bit, and in both linear or perceptual light. You may also find Elle Stone's variant to your liking,

[rich2005]

It is worth trying, Gimp 2.9.5 is a development version with the inevitable bugs that come and go.

Windows users can install it alongside their existing Gimp 2.8. Two pre-built
http://www.partha.com (64 bit only) and http://samjcreations.blogspot.co.uk/2017/ (32 & 64 bit).

A hint: The first time you run Gimp 2.9.5 it creates its own Gimp profile. It will try and copy any resources from Gimp 2.8 profile, which might/might-not work in Gimp 2.9
For the first run, disable your Gimp 2.8 profile by renaming it, that gives a clean 2.9 profile. Then rename back.

The inevitable screenshot.



Many of the tools now work directly on the canvas, The new gaussian blur is one.
If using a paint brush, keep away from legacy mode or you get a boundary regardless of precision or linear modes.

Remember, Saving a .xcf image in Gimp 2.9.5 does not always make it backward compatible with Gimp 2.8 but it will warn you.