Fixed the 2 remianing issues before PR, the shadow program needed to have the binding assigned and the Head of the avatar isn't getting it's BBox evaluated

interface/src/avatar/FaceModel.cpp

@@ -39,6 +39,8 @@ void FaceModel::simulate(float deltaTime, bool fullUpdate) {
     setPupilDilation(_owningHead->getPupilDilation());
     setBlendshapeCoefficients(_owningHead->getBlendshapeCoefficients());
     
+    invalidCalculatedMeshBoxes();
+
     if (isActive()) {
         setOffset(-_geometry->getFBXGeometry().neckPivot);
         Model::simulateInternal(deltaTime);

interface/src/avatar/Head.cpp

@@ -251,6 +251,7 @@ void Head::render(float alpha, ViewFrustum* renderFrustum, Model::RenderMode mod
     } else {
         RenderArgs args;
         args._viewFrustum = renderFrustum;
+     //   _faceModel._calculatedMeshBoxesValid = false;
         _faceModel.render(alpha, mode, &args);    
     }
 }

libraries/render-utils/src/Model.cpp

@@ -336,6 +336,9 @@ void Model::init() {
         
         _shadowProgram.addShaderFromSourceCode(QGLShader::Vertex, model_shadow_vert);
         _shadowProgram.addShaderFromSourceCode(QGLShader::Fragment, model_shadow_frag);
+        // Shadow program uses the same locations as standard rendering path but we still need to set the bindings
+        Model::Locations tempLoc;
+        initProgram(_shadowProgram, tempLoc);
 
         _skinProgram.addShaderFromSourceCode(QGLShader::Vertex, skin_model_vert);
         _skinProgram.addShaderFromSourceCode(QGLShader::Fragment, model_frag);

libraries/render-utils/src/Model.h

@@ -269,6 +269,9 @@ protected:
     /// first free ancestor.
     float getLimbLength(int jointIndex) const;
     
+    /// Allow sub classes to force invalidating the bboxes
+    void invalidCalculatedMeshBoxes() { _calculatedMeshBoxesValid = false; }
+
 private:
     
     friend class AnimationHandle;