public void setResolutionMultiplier(float val) {
        resMult = val;
        if( environment.getVRViewManager() != null ){
            environment.getVRViewManager().setResolutionMultiplier(resMult);
        }
    }
Set the resolution multiplier.
@param val the resolution multiplier.
jme3-vr/src/main/java/com/jme3/app/VRAppState.java