Opacity. Specifies material opacity.
opac= * val *
Material opacity (percent); 0…100
The following material/object combinations support variable opacity:
- Solid color and repeatable textures applied to texturable overlap objects.
- Window covering materials applied to window covering frame objects.
- Decals applied to texturable objects or wall objects.
If the material includes an image with an alpha channel, opac= can be used to make the image more transparent, but not more opaque.
Material attribute. Ignored if the current object selection or the material does not support opacity.
opac=100 , for a fully opaque material (if the image does not include an alpha channel).