void AddBlip(ref BlipRenderingData data, ViewportBlip blip) {

        var blipRect = new Rect();
        blipRect.size = Vector2.one * blip.viewportRectSize;
        blipRect.width /= MainCamera.CameraInstance.aspect;
        blipRect.center = blip.viewportRectPos;

        if (data.blipCounter == 0) {
            data.viewportRect = blipRect;
        } else {
            data.viewportRect = data.viewportRect.Union(blipRect);
        }
        data.viewportBlips[data.blipCounter] = blip;
        data.blipCounter++;
    }