A designer's portfolio is based on visuals, which, if changed by someone other than the designer, no longer follows their intent and may not be representative of their design capabilities. While it may be contributed to the project, there is a definite need for those visuals to remain in a stable state for an extended period of time.
A developer's portfolio is based on projects, which typically either continue or stagnate, but do not vary enough from intent that their contribution is not discernable. Or, the contribution is to the project as a whole and that itself is the portfolio item.
It may sound like an ego trip, but this is a very real thing in the design world. You have to show your work, in production. It's one of the reasons I can no longer get a job as a designer - I've been a developer for too long and my past visual works are no longer used in production and I have nothing to show that I was actually ever a designer.
TLDR: It's not enough for the designer to say "I contributed to the project". They have to show visual proof because they are being hired or retained for their viewable work. A change in that design means it is no longer "their" work.
A designer's portfolio is based on visuals, which, if changed by someone other than the designer, no longer follows their intent and may not be representative of their design capabilities. While it may be contributed to the project, there is a definite need for those visuals to remain in a stable state for an extended period of time.
A developer's portfolio is based on projects, which typically either continue or stagnate, but do not vary enough from intent that their contribution is not discernable. Or, the contribution is to the project as a whole and that itself is the portfolio item.
It may sound like an ego trip, but this is a very real thing in the design world. You have to show your work, in production. It's one of the reasons I can no longer get a job as a designer - I've been a developer for too long and my past visual works are no longer used in production and I have nothing to show that I was actually ever a designer.
TLDR: It's not enough for the designer to say "I contributed to the project". They have to show visual proof because they are being hired or retained for their viewable work. A change in that design means it is no longer "their" work.