Inventor mental ray

Inventor is a real-time 3D scene viewing technology introduced by Silicon Graphics. There is a version of mental ray called ivray that has Inventor support built in. It can be used to read scene files and display and manipulate them in realtime on the screen, and rendering and writing them back to disk. Since OpenGL and Inventor do not support custom shaders, very simple shaders are used for the realtime display. Although ivray can be used like a regular mental ray executable, this is not recommended because it is larger and takes slightly longer to start up. ivray up to 3.2 is supported for Silicon Graphics systems only. ivray 3.3 and higher is available for Silicon Graphics and Linux. The following additional command line options are supported:

-inventor

Enables the realtime Inventor viewing window. ivray will read the scene file up to the first render command and then create the Inventor window instead of rendering.

-ivdrawstyle S_1 S_2

Static and moving objects will be drawn using styles S_1 and S_2, respectively. Available styles are shade (shaded), wire (wireframe), and box (bounding box). The default is shade wire.

-ivleaf on|off

If on, use the leaf instance list to collect objects instead of replicating the mental ray scene graph as an Inventor scene graph. This is useful for scenes with multiple instancing. The default is off.

-ivout "filename "

Write the scene as an Inventor scene file named filename.

-ivrendercache on|off

Enable or disable Inventor object caching. This is on by default.

-ivstrips on|off

Enable or disable triangle strips. Strips slightly increase tessellation time but can significantly improve display performance. Strips are enabled by default.