In perspective drawing, the principle of "diminution of size" states that objects appear smaller as they recede into the distance, creating the illusion of depth and spatial relationships within the artwork.

Blending is a technique used to create smooth transitions between colors or tones, resulting in a gradual and seamless change in hue, value, or intensity.

Stippling, cross-hatching, and scumbling are all techniques used to create texture in a drawing. Stippling involves applying small dots to create a textured surface, cross-hatching involves creating a series of intersecting lines, and scumbling involves applying a dry brush with short, irregular strokes.

Using a grid in drawing helps artists maintain accurate proportions and scale by dividing the subject or composition into equal sections, allowing for precise measurements and placement of elements.

Hatching is a shading technique that involves creating a series of parallel lines to create shadows, highlights, and textures in a drawing. The direction, spacing, and thickness of the lines can be varied to achieve different effects.

Underdrawing refers to the initial sketch or outline of a drawing, often done in a light or faint manner, which serves as a foundation for the subsequent layers and details of the artwork.

Charcoal is a drawing medium made from burnt wood or organic materials. It is known for its soft, blendable qualities, allowing artists to create smooth transitions and subtle shading effects.

Rendering refers to the process of adding details, refinements, and finishing touches to a drawing. This stage involves carefully working on the values, textures, and shading to bring the artwork to a higher level of completion.

Cross-hatching is a drawing technique that involves creating a series of short, intersecting lines to create shadows, highlights, and textures. The lines are typically drawn at different angles to create a dense and textured effect.

Composition refers to the overall arrangement and placement of elements within a drawing. It involves considerations such as balance, unity, emphasis, and rhythm to create a visually pleasing and cohesive artwork.

Graphite is a drawing medium made from carbon. It is known for its hard, precise lines, making it suitable for detailed and technical drawings. Graphite pencils come in different grades, ranging from soft to hard, allowing artists to vary the darkness and thickness of their lines.

Value refers to the relative lightness or darkness of a color or tone. It is one of the fundamental elements of art and design, along with hue and saturation, and plays a crucial role in creating form, depth, and contrast in a drawing.

Stippling is a drawing technique that involves creating a series of dots to create shadows, highlights, and textures. The dots can be applied in a regular or irregular pattern, and the density and spacing of the dots can be varied to achieve different effects.

Blocking in refers to the process of creating a rough sketch or layout of a drawing. This stage involves establishing the basic shapes, proportions, and placement of elements within the composition before moving on to more detailed rendering and refinement.

Colored pencils are a drawing medium made from pigments bound with wax or oil. They are known for their vibrant and saturated colors, making them suitable for creating colorful and expressive artworks.