How do I display features below ocean surface?

Hello, I am trying to display features to scale under the ocean surface. I need to show that my features are floating well above the ocean floor. I have bathymetry data for the ocean floor and I have 3D vector features representing my pens. The pens are 30m in depth from the ocean surface. The features have elevation attribute (0m) and Height attribute (-30m), but when I view them in 3D they are stuck to the ocean floor, rather than the ocean surface. How do I tell my features to be relative to ocean surface?





sarahmunford
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