Volumetric painting is a rather broad concept. From the meaning of the words it is clear that volumetric painting is art paintings with relief beyond the plane.
Impasto
Impasto is an artistic technique that allows you to create a small volume in paintings. The artist works with dense thick strokes that create relief. To create three-dimensional paintings in this technique, the paints must be thick, able to maintain a given shape, and not crack when drying. These are oil paints, acrylics and texture pastes by Evgenia Ermilova. Evgenia Ermilova™ pastes (both in jars and tubes) have all the necessary properties to create dense relief strokes in the pasty painting technique. The main tools for impasto are palette knives and wide brushes.
Examples of three-dimensional paintings in the impasto technique:
The authors of the works in the photo: artist Justin Gaffrey (oil on canvas)
and a student of the school of sculptural painting Natalia Stepanova (canvas on a stretcher, texture paste, acrylic, potal)
The authors of the works in the photo: Vita Voloshchuk, a student of the school of sculptural painting (MDF, acrylic, oil)
and Mark Ermilov, an aspiring artist (plywood, texture paste by Evgenia Ermilova™)

The authors of the works on the photo: artist Joshua Miels and Justin Gaffrey (canvas, oil)
Textural painting
Textural painting is a type of modern art, when three–dimensional paintings are created using a variety of materials and techniques. To create such paintings, not only artistic materials are used: paints, texture pastes, but also non-artistic ones: building plasters, gypsum, fabric, plastic, finished elements, etc. A wide variety of tools are used to create textured paintings: from brushes to construction spatulas. Textured painting has gained the greatest popularity for creating interior paintings with abstract subjects. But, of course, in texture painting, you can create three-dimensional paintings in different genres: from still life to portrait.
Examples of textured paintings:
The authors of the works: sculptural artist Elena Domashkina (plywood, texture paste by Evgenia Ermilova™, acrylic),
and a student of the school of sculptural painting Vita Voloshchuk (drywall, plaster, acrylic)
The author of the works: graduate of the school of sculptural painting Valentina Koroleva (plywood, paste, acrylic)
Bas-relief
According to the definition, a
bas-relief is a type of relief sculpture in which the image protrudes above the background plane by no more than half of its volume. Bas-relief is used to decorate architectural structures, interior walls in apartments and to create three-dimensional paintings on various subjects. Bas-reliefs are created from clay, gypsum, carved from marble or wood, cast from alabaster or bronze. Tools: spatulas, cutters, palette knives, stacks.
Examples of paintings with bas-relief:
The authors of the works: a student of the school of sculptural painting Vita Voloshchuk (canvas on a stretcher, MDF, plaster, acrylic),
a graduate of the school of sculptural painting Valentina Koroleva (MDF, plaster, acrylic)
The author of paintings with a botanical bas-relief is a student of the school of sculptural painting Alevtina Pankratova.

Authors of the works on the photo: artist Dmitry Kuzmin and artist Larisa Kuzmina
Sculptural painting
Sculptural painting is a new kind of modern art, a symbiosis of elements of flat painting and three–dimensional sculpture. The essence of the technique is the application of artistic texture paste with a palette knife on the base according to certain rules. The main materials for this technique of creating three-dimensional paintings: texture paste and relief paste Evgenia Ermilova Tools — artistic palette knives of different sizes, brushes. The technique of sculptural painting can be used to create paintings in different genres: portrait, landscape, marina, animalism, still life.
Examples of three-dimensional paintings in the technique of sculptural painting from texture paste:
Author Evgenia Ermilova, author of the technique and school of sculptural painting (MDF, texture paste Evgenia Ermilova™)