Can anyone give me some pointers on why I have shadows that pass through objects, and also appear on the underside of floors/ceilings even though casting object is on the other side?
Hope I’m just missing some culling or material flag somewhere 
class Main extends hxd.App {
static function main() {
new Main();
}
public function new() {
super();
}
override function init() {
super.init();
var cubeA = new h3d.prim.Cube(10,10,1,true);
cubeA.unindex();
cubeA.addNormals();
var meshA = new h3d.scene.Mesh(cubeA, s3d);
meshA.material.mainPass.enableLights = true;
meshA.material.shadows = true;
var cubeB = new h3d.prim.Cube(5,5,1,true);
cubeB.unindex();
cubeB.addNormals();
var meshB = new h3d.scene.Mesh(cubeB, s3d);
meshB.material.mainPass.enableLights = true;
meshB.material.shadows = true;
meshB.z = 5;
var cubeC = new h3d.prim.Cube(1,1,1,true);
cubeC.unindex();
cubeC.addNormals();
var meshC = new h3d.scene.Mesh(cubeC, s3d);
meshC.material.mainPass.enableLights = true;
meshC.material.shadows = true;
meshC.z = 8;
var shadow = s3d.renderer.getPass(h3d.pass.DefaultShadowMap);
shadow.power /= 10;
// light from behind, angled down
var light = new h3d.scene.fwd.DirLight(new h3d.Vector(0,0.25,-1), s3d);
light.color.load(new h3d.Vector(1,1,1));
s3d.camera.zNear = 1;
s3d.camera.zFar = 1000;
s3d.camera.fovY = 45;
s3d.camera.pos.set(0, 10, 30);
s3d.camera.target.set(0, 0, 0);
new h3d.scene.CameraController(s3d).loadFromCamera();
}
}