Hello and thank you for posting this question.
In 3D Framing Rending mode are visualised only walls and roofs framing stud skeletons.
Retaining walls (block walls) available in Landscape tab aren’t visible in 3D Framing Rending view.
In a wall Properties setting the stud spacing to minimum (50 mm) will render solid wall as a result in 3D Framing Rending view. Increase the spacing to over 100 mm to see stud wall.
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