For one of the US based client, we have done customization on Forge viewer. Here the model is loaded from A360 drive to Forge Viewer. We have changed the color and transparency of selected entities. Added new simpler custom controls to Forge Viewer so that loaded model can be controlled easily as per user requirements. Have handle camera movements – to move camera around the center of model, move camera around and in front of selected entity, move camera inside and outside of the loaded building model.