"To what extent can someone who works on a different aspect of a game contribute to another area?" Your example, isn't an example... core game design? The answer I'd give to your question above, is that these boundaries depend on the studio and its people that you're working for. "What's your experience of contributing to…
The process of making a game obviously involves the combined effort of many people specializing in different areas: asset creation, programming, game design/testing etc. To what extent can someone who works on a different aspect of a game contribute to another area? For example I started primarily in core game design…