====== Units and scaling ======

The SpeedTree system, from the Modeler through to the SDK, is unitless. However, trees in the SpeedTree model library are modeled where one unit represents approximately one foot. If a conversion is necessary, there are a few possible approaches:

    - Scale the model upon export to the .stsdk format. The Modeler's export dialog has a geometry scalar text box to support this.\\ \\
    - When creating instances of a given tree, multiply the value assigned to ''SInstance::m_fScalar'' to compensate for the units difference. The tree will still be in the same units, but the culling and shader systems will interpret them with the correct scale value.\\ \\
    - Scale the tree in the Modeler using either **Tools** > **Scene unit conversion...** or **Tools** > **Arbitrary scene scale**.