How to add landscaping with elevations after the fact.

[aceinc]

I have created a reasonable facsimile of the exterior of my home. It has 3 levels. Now I need to add driveways, retaining walls all with elevation changes which are below the height of level 0.

How can I accomplish this?

Tutorials are great, just point me to them.

[aceinc]

Related questions are;

Is it possible to add a level below Level 0?

Can level 3 have a lower elevation than level 0, if you forgot to put in a lower level?

[Puybaret]

The tools to design your landscape depend on how accurate you want it to be. You could use simple objects like triangles or other basic shapes like in this tip or this video.
If you want go further, you'll probably have to use some other software like Cecilia shows here.

It's never too late to add a underground level or a lower level in Sweet Home 3D. Just create a new level and change its elevation with a negative value if needed.

[aceinc]

The tools to design your landscape depend on how accurate you want it to be. You could use simple objects like triangles or other basic shapes like in this tip or this video.
If you want go further, you'll probably have to use some other software like Cecilia shows here.

It's never too late to add a underground level or a lower level in Sweet Home 3D. Just create a new level and change its elevation with a negative value if needed.

Thanks for the tip. I incorrectly assumed the levels were related to their vertical position in the drawing.

Now I need to detemine how to do curving slopes.