Props are actors used to build the level's environment. They are equivalent to the Objects in version 3.
Keeping dimensions consistent between props is important to maintain a cohesive art style.
|Foundation Depth||1m below lowest doorway|
|Normal Doorway||1.75m wide by 2.25m tall|
One issue in version 3 was inconsistent window sizing which meant buildable barricades couldn't properly cover them. While not implemented yet, version 4 has several default window sizes to generally follow. Breakable glass and frame props will be designed to fit these window sizes.
|Window||1m above floor and 50cm below ceiling|
|Small Window||1m wide by 1.5m tall|
|Medium Window||1.5m wide by 1.5m tall|
|Large Window||2m wide by 1.5m tall|
|Lower Lip Trim||5cm above/below, and 10cm out to the sides|
|Edge Trim||5cm above/below, and 5cm out to the sides|
Here is a good reference for window types: