Describe the suggestion
Support for *translucent objects in IR

Applications of the suggestion
Allows modelers to add physical windows to trains.

IR already supports that? You can have Alpha 0 for a transparent texture and 1 for opaque

Unless you meant trans lucent in which case it will probably take up to a 100 years and a complete rewrite of IR's render engine

Translucency. Like what Little Tiles offers with its alpha scaling options

This might be incredibly difficult due to how MC's render system functions