RealFlow can work with virtually any 3D program, but every program has its axis setup. Some programs use the Y axis as the vertical axis, others the Z axis. If the axis setup is not correct than all imported and exported objects – including particles – will be tilted around 90°. Change the setup under File | RealFlow > Preferences > General > Miscellanea > Axis Setup.
Here are your options:
- YXZ (Lightwave, Cinema 4D)
- ZXY (3ds Max, Maya)
- YZX (XSI, Maya, Houdini)
Furthermore, you have the possibility of changing between a local (upper image) and a global (lower image) coordinate system with this button of the icon bar:
