3D skybox & 2D skybox will not render in RenderViews if the origin is inside the world

[marchc1]

Details

With a normal camera, going into the world will stop the skybox from rendering completely, as expected...

However, in the case of say a portal, this behavior causes the skybox to not render even though I should be able to see it due to the portal.

Perhaps an additional boolean in ViewData for always rendering the skybox?
If the code is similar to viewrender.cpp, where this check is performed...

if ( ( nSkyboxVisible != SKYBOX_3DSKYBOX_VISIBLE ) && r_3dsky.GetInt() != 2 )
    return NULL;

... could this have an override for if that aforementioned ViewData boolean is set to true? There probably would need to have a check somewhere else too, since, unless the r_3dsky != 2 check is removed from gmod, that did not fix the problem.

Steps to Reproduce

1. Call render.RenderView with an origin that is in the world