glTF defined materials within the 3d model (not the one defined in Plume), when their alphaMode property is set to BLEND, are displaying a shadow in the transparent areas, when looked from an angle that is not perpendicular to the surface. Of course, depending how it blends with the background. Is there a way to make the transparent areas totally transparent? First image: Perpendicular invisible. Second image: Changing the angle. Basically, it is about make the transparent areas fully transparent when the background is darker, or not white.
