Form analysis, structure and spatial representation
The EbAU paper for Dibujo Artístico II rarely rewards a faithful copy of a silhouette. This block tests whether you can take a given motif - still life, object set, reference photograph - and break it into volumes, axes and planes, then place those volumes in a credible space that has a ground plane, a light source and an implied viewer.
From silhouette to mass
- Every visible shape is the projection of a volume. Rank the volumes: primary mass (dominant body), secondary masses (handle, spout, folds, branches), tertiary detail (facets, texture). Fix the ranking before any shading.
- Use the enveloping box (caja envolvente) for width, height and depth, then the axis (eje) for tilt, then the planes (planos) where the surface turns from light to dark.
Structure before appearance
- Structure is the hidden architecture that explains the surface: the vertical axis and circular mouth of a jug, the ribcage–pelvis relationship of a figure, the load-bearing points of drapery.
- Draw through the form (líneas pasantes) so hidden edges align, then erase. Retained, corrected construction lines usually read as stronger analysis, not as error.
Cues that build space
- Overlap, relative size, height on the picture plane, convergence of parallels, texture gradient and atmospheric fade.
- Ground contact: base ellipse plus contact shadow. Without these, objects float like a collage.
Worked example
A stoneware jug and a folded cloth. Box the jug, then measure height against width with the pencil (about 1.8:1) before committing. Mark the tilted axis, then neck and base ellipses, both with their minor axes on that axis. Your eye level is above the mouth, so the top ellipse is visible; the higher the eye, the more open it becomes. The cloth becomes three primary planes - table, rising fold, falling fold - each a triangle sharing an edge. Only then model, treating plane changes as value breaks.
Traps that cost marks
- Outline first, tone second: the drawing never acquires volume.
- Ellipses that share no axis, or a different eye level for each object.
- Each object drawn at its own scale, so the group occupies no measurable space.
- Erasing all construction, leaving no evidence of the analysis the question is asking for.