DrawRefraction C# method.

gistfile1.cs

private void DrawRefractionMap()
{
  _device.SetRenderTarget(_refractionRenderTarget);

  _device.Clear(ClearOptions.Target, Color.CornflowerBlue, 1.0f, 1);

  DrawSkybox(_viewMatrix, _projectionMatrix, _cameraPosition);
  DrawTerrain(_refractionEffect, _viewMatrix);

 _device.SetRenderTarget(null);
 _refractionTexture = _refractionRenderTarget;
}