ALWAYS use the grid when building a level using modular pieces. Smaller props can get away with not being on the grid in my opinion. It's not only faster if you use the grid for modular pieces, but more proficient as well. You avoid many issues such as z-fighting and gaps that could lead to draw distance leaks. Modularity…
So I have read over many articles everyone here was kind enough to share, but I have to ask another question. Why in an engine like Unity would a grid based system be needed? What is the disadvantage of free form map building with modular pieces? That is all :: )
I think sticking to the grid is a must when building modular stuff. You really want to keep to the grid on for the larger parts that define the structure and then you can disable the grid for the smaller items like windows etc. Keeping to the grid will enable easy snapping of the modular parts and save time messing about…
If you are doing an FPS it is a must, but if your using a modular set up for parts of the environment that the player will never interact with you can sometimes get away with just winging it. Its the type of thing you get with experience you just have set aside time for trying out a few modular set ups or just account for…