What technique would be used to make the drywall texture in the photos?
Its from the walls of a house built in 1964. All the walls are textured the same, so I assume the method was quick and simple. The texture is only used on the walls. The ceilings have a different texture.
It's has fewer ridges per square foot than a "stomp brush" texture - which I tired, using a drywall brush I purchased at home depot.
It also has fewer ridges per square foot than I can get by using paint roller to apply joint compound.
The tops of the ridges are rounded and smooth - they aren't "knocked down" to make them flat.
A significant part of the surface is flat so, when painted with semigloss paint, light reflecting off the surface gives it a sheen.