Causes the model to be rendered in two passes: The first pass renders only the opaque portions of the model, and the second pass renders only the translucent portion of the model.
The use of
$mostlyopaque can be used to improve the visual quality of models such as foliage or underbrush, by improving the lighting on the translucent materials.
$opaqueon all models is good form, as it prevents odd lighting errors and visual artifacts with shadows.
- $opaque - Similar command for models that have mostly opaque materials, and renders in one pass.