Can I get the normals from my models I load?
I make the models in Blender.

I can work it out myself for simple models , however for shapes with many surfaces what can i do?

Include the version of away3d you are using when you post.
In Broomstick, maybe

mesh.geometry.subGeometries[#].autoDeriveVertexNormals = true;
and
mesh.geometry.subGeometries[#].vertexNormalData

Haven’t tried it though.

With or without broomstick, it should be possible to calculate the vertex normals manually just accessing the vertex/face data and taking cross products