Change Brep opacity, color, etc. in C++?

@NathanM1994 wrote:

Hi,

Within a custom CRhinoBrepObject I need to change its transparency inside Draw(). I’ve tried something like this:

        CDisplayPipelineMaterial material = dp.DisplayAttrs()->m_pMaterial->m_FrontMaterial;
	material.m_FrontMaterial.SetTransparency(1.0);
        dp.DrawShadedBrep(*const_cast<ON_Brep*>(Brep()), &material);

However my Brep keeps being opaque:

pic01.png1624x1179 41.9 KB

Though something must be well done, when I translate it looks transparent:

pic02.png1527x1144 45.6 KB

Seems like Rhino will always draw my object on top depth with the opaque default color? How can I manipulate it?

Thx
Nathan

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