If the scale is off, then the simulation will be off. A very large flag behaves differently from a handkerchief. It is important to think about size in doing clothing simulations. If you change the system unit before applying Cloth, the modifier automatically adjusts the cm/unit setting. With the given direction of –1 m / 0 m / -1 m a vector will be created at a 45-degree angle in the negative XZ quadrant (see left image below).Attention: The following information is necessary only if you change the system unit after applying the Cloth modifier. When dealing with wind blowing along two or three axes at the same time, a vector will be calculated between the directions. For example, you can set Wind Direction X to a negative or positive value to make the wind blow along the –X or X axis respectively. You can enter positive or negative values. These parameters define the direction of the wind. This parameter can be animated increasing the value to 100% during these frames of animation can stabilize the cloth at these moments of intense motion. This can become very handy in situations where there is any extreme motion performed by a character or object and the cloth needs to stabilize for those few frames.

Meaning that this will control the dampening (energy loss) for all parameters of the cloth object not just the wind. Much like that of the Wind Drag parameter, but this parameter deals with the energy loss of the cloth object on a global basis. By lowering this value, this will increase the amount of force that Gravity will exert on the cloth object in the –Y direction. This value will default to –9.81, which is Gravity’s actual force in the real world (-9.81 m/sec^2 to be exact!). If it’s positive it will be calculated up the Y axis.

If the number in this field is negative, Gravity will be calculated down the Y axis. The Gravity parameter will always be calculated for the Y axis and will have an effect on the cloth object on that axis. Gravity is a force that pulls the cloth object in a certain direction. This means each cloth object can be assigned its own forces, letting different cloth objects be affected by entirely different wind or gravity values. The attributes in this tab simulate real world forces such as gravity and wind. Function available in CINEMA 4D Studio Cloth Tag

C4d cloth surface