1 or 2... I experimented with some Post-processing layers. I think using film grain and vignette will really add to the atmosphere of the game, other effects I think I want to wait till I have a closer to finished product to test with before making a decision. I also think I want to keep the effects subtle so as to not be obnoxious so I'm going to try to use as few as possible .
Af fine map indeed Another bug I encountered in my previous project was when using the PSX shader on large surfaces the warping became severe which was disorientating while playing. This is because the affine mapping that the shader does to emulate the affine mapping the PS1 did, approximates the positions of vertices in screen space meaning that if the vertex in question is far off-screen the approximation becomes more inaccurate meaning that if you subdivide the meshes into smaller triangles the effect is drastically diminished.