LightWave animations are boring. The real world has billions of details that people are used to seeing in any image or animation. Your goal as an animator is to recreate enough of those details to convince the viewer.
One of the details which can add that subtle realism effect is air shimmer. Make hot pavement, fires, jet exhaust, and deserts with the HeatWave tool. Its animated effect is simple to apply and animate, and its realtime preview gives you instant feedback to design the exact effect you need.