Usually games like SMAC are called 2.5D or simialler.
I'm inclined to think that Roller Coaster Tycoon wouldn't be nearly as fun in 3D, but I really should reserve judgement until trying RCT3.
With good artists I think that 2D graphics are easier to make look very good, but with poor artists I think 3D graphics can actually be easier, because a lot of the effort is put into modelling.
My opinion is that certain simulation/city builder games (Sim City, Caesar, Tycoon, Settlers Series) are better in 2D, while RTS games are better in 3D, I really can't honestly say that Total Annhilation, Warcraft 3 or C&C Generals would have been better in 2D, the 3D graphics really can add a lot, especially with terrain and making the units move and act smoothly. But in a simulation game you need to do a lot of precise placement of buildings, paths etc, and here the 2.5D isometric is a big boon.
So in short, building games = 2D, fighting games = 3D.
Something about The Sims 2 is that all the game mechanics are still the same as the old 2.5D isometric, you can just move the camera around - but highly detailed 3D models and textures were required. The Sims 2 was probably only possible because of the mind bogglingly massive budget it no doubt got. Any 2.5D probably could be adapted to 3D in much the same way - that is - with a large enough budget.
I'm inclined to think that Roller Coaster Tycoon wouldn't be nearly as fun in 3D, but I really should reserve judgement until trying RCT3.
With good artists I think that 2D graphics are easier to make look very good, but with poor artists I think 3D graphics can actually be easier, because a lot of the effort is put into modelling.
My opinion is that certain simulation/city builder games (Sim City, Caesar, Tycoon, Settlers Series) are better in 2D, while RTS games are better in 3D, I really can't honestly say that Total Annhilation, Warcraft 3 or C&C Generals would have been better in 2D, the 3D graphics really can add a lot, especially with terrain and making the units move and act smoothly. But in a simulation game you need to do a lot of precise placement of buildings, paths etc, and here the 2.5D isometric is a big boon.
So in short, building games = 2D, fighting games = 3D.
Something about The Sims 2 is that all the game mechanics are still the same as the old 2.5D isometric, you can just move the camera around - but highly detailed 3D models and textures were required. The Sims 2 was probably only possible because of the mind bogglingly massive budget it no doubt got. Any 2.5D probably could be adapted to 3D in much the same way - that is - with a large enough budget.
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