Image note
Three original interpretations of sandstone arches & sheltered surfaces, informed by Ennedi Massif: Natural and Cultural Landscape. These images explore material and spatial ideas; they are not documentary views or measured reconstructions of the reference. The palette is drawn from the material portrait.
Publication credit: The Chromologium.
Image credits and reuseThe colour strip is the entry’s study palette. Artwork sources and image credits and reuse terms are recorded in the archive.
Artwork recordThree views of one material idea.
Wind and water have cut the Ennedi sandstone plateau into arches, cliffs and canyons. Rock paintings and engravings connect these landforms to a long history of human presence.
Read the material study01 / Reading the material
The underside of the arch
Ennedi’s sandstone formations make erosion visible through edges, recesses and openings. A sunlit face and a protected underside can appear dramatically different while belonging to the same mass. The material study is therefore also a study of orientation to light.
02 / From surface to space
Read the whole.
Then the edge.
An arch frames space while remaining part of a larger landform. A close crop emphasizes the opening; a wider view restores the plateau and the route through it. Where cultural marks occur, their shelter and setting belong in the record alongside the marks themselves.
Compare a wind-exposed edge with the protected underside of an arch. Record the shelter as well as the marks it holds.
03 / Colour in context
A palette you can work with.
Five tones drawn from the material portrait. Select a colour, compare it on paper and ink, or copy its value into your own study.
Surface
#935d2f
Colour values & paper / ink comparison
oklch(0.529 0.094 59.034) · primary
The colour stays fixed as its surroundings change.
Try the bench exercise
04 / At the bench
Make the observation tangible.
Cut an asymmetric opening into a simple mass and light it from one side. Compare exposed and recessed surfaces without changing their base colour. Avoid reproducing rock-art imagery as a surface treatment.
Keep a view of the whole beside a close detail. Note the material, lighting and the one variable you changed.
Source & orientation
Keep the reference close.
UNESCO World Heritage Centre. (n.d.). Ennedi Massif: Natural and Cultural Landscape. Retrieved October 10, 2026.
The material readings and bench exercise are editorial studies of this particular reference. The artwork explores its material ideas; the linked source documents the place.
Artwork & cartographic records
Artwork record · Geographic plate record. Map geometry: Natural Earth, public domain. The archive follows its map’s place names, including territories and disputed areas.
A closer look
Questions about this study
What does this study of Chad focus on?
Wind and water have cut the Ennedi sandstone plateau into arches, cliffs and canyons. Rock paintings and engravings connect these landforms to a long history of human presence.
Where can I find the original reference?
Ennedi Massif: Natural and Cultural Landscape, published by UNESCO World Heritage Centre. The artwork explores the reference’s material ideas; the linked source documents the place.
What could I try at the bench?
Cut an asymmetric opening into a simple mass and light it from one side. Compare exposed and recessed surfaces without changing their base colour. Avoid reproducing rock-art imagery as a surface treatment.
Continue by material
