Selectable shaders

^ Yeah, that's basically what I was going to post. They're trying to nail down the shader choice now because that will dictate how the rest of the game will be designed. With a particular set of lighting rules in mind, you may or may not go certain directions with design choices or even entire areas. The shader pick could be seen as a starting point to how the game is fleshed out graphically, what does/does not look good under its context may not work well under the other.

So, I'd rather them take one and focus the design of the game around that. I don't think it's as simple as adding a filter on top of existing graphics, they're having to play around with lighting A LOT to get character 3 looking the way it does, for example. If 1 takes it and we somehow add an optional toggle for 3, they wouldn't have budgeted time/resources to have that shader behave properly in all in-game animations and environments, so it may appear sloppy, glitchy or otherwise unfinished. That's my take on it, anyways.

It's worth reiterating that the shaders being discussed here are not just simple filters. From a technical POV, there may be a whole family/group of graphics-specific issues that may come up during development and validation that may be tied to how the chosen shader behaves. And this is just for one shader.

If we're talking about multiple shaders, then the number of possible issues graphics-wise will increase substantially and may result in a rather buggy game on release due to deadline limitations and what not. I truly believe that the character and enemy models that will be ultimately used in the game will not be simplistic enough to employ multiple shaders without major drawbacks as we say, compared to something like a Katamari game for example.