Hey,

I recently upgraded a project from 4.0 to 4.1.1 beta to avoid a context loss problem.

It’s a book with double-sided pages. I took some advice from this forum for creating double-sided planes by adding a second plane mesh as a child of the first and inverting the faces. This all worked fine in 4.0.

However since 4.1, as the page flips and curls over, the back-side of the page appears behind everything else in the scene. Not only the parent mesh (i.e. the front side of the page) but every other mesh in the scene.

I can confirm that this isn’t an issue with the bend mod I’m using, as the same problem occurs if I remove that and just change the rotationY of the page.

Take a look at the 4.0 and 4.1.1 screenshots below.

Thanks,

Tim

Do any experts have an idea what’s happening here? Would this be considered a bug, or is the practive of adding meshes as children of other meshes not advised any more? (in favour of using ObjectContainer3D perhaps?)

I’ve pulled the latest 4.1.2 version, but still nothing. Any advice at all?

Ok, I’ve finally gotten to the bottom of it.

It had nothing to do with the fact that one mesh was a child of another, as I discovered when switching to using an ObjectContainer3D. It was in fact to do with using alphaBlending on the material. I needed to apply the zOffset property, as explained in this post: http://away3d.com/forum/viewthread/3495/