Take the original Albert Mansion set down to a creepier level with the Albert Mansion Sunken Add-on. Included is a murky pond prop (with 8 materials for the water), along with spooky lights, carefully placed cameras, and a material setting that adds algae to the mansion.

If you want to lighten the mood, a peaceful nature scene is included that simply features the ground and pond. No HDRI is included with this environment, but the render settings from the original set still work very well.

The pond prop is a separate piece of geometry so you can use it in other scenes.

There is a material setting for underwater scenes and wide-angle cameras to help get your scene set up quickly. The fog prop included with the original Albert Mansion product should be hidden when rendering underwater.

You can return the mansion to the original look by using the material preset included with the original product or by editing the surface settings.