Note: I have briefly looked in the UGerstnerWaterWaves::GetWaveHeightAtPosition Found in the GerstnerWaterWaves.cpp which appears to sum each GerstnerWave height to produce the output. Though I haven’t had too much time to dive deep into Gerstner waves. Though I assume from the comments /** Computes the raw wave perturbation of the water height/normal */ it should be the wave height. The word Raw does raise questions on if other steps occur elsewhere for the end resulting wave height?