Hi,
My scene is a 3D scene. Assume that I have taken a screenshot of my scene. I need to erase few meshes from the screenshot. (Hiding the meshes and taking a screenshot is not OK for me).
So, what I need is, the 2D polygon(s) of each mesh. How can I achieve that?
Thanks in advance.
Woot, this seems really complex. To get that info, you kind of need to project (using Vector3.Project) all vertices and then build a polygon from that
That does not seem to be the more efficient 
I need this. Any code sample?
Nope 
But easy to do. Just run through the list of vertices and call Vector3.Project
Looking at glow layer code may give some simple and clean approach?
I do not think so as the glow layer is using the depth renderer and thus will require a render. What you need seems more geometric
If you can render the scene again then just hide the objects you don’t want 
How about creating two screenshots, one full and one with just the meshes you want to erase, and then use the latter for erasing?
Yeah. This is the solution which is in my mind at this point. I want to capture screenshots of every mesh (by hiding other n-1) meshes. From each image, find the boundary of the mesh(as non-mesh pixels will have the transparent color). Save this data and use it further.
But, I somehow feel like we need to go with a mathematical approach like professionals.