Most grid tools ask you to drag vanishing points around until the picture “looks right”. Sara wanted the opposite: pick a lens, point a camera, and get the grid a real 24 mm or 50 mm shot would produce, then draw on it. That idea became the camera model behind every tool on this site, from the one-point grid to the fisheye and the vanishing-point finder.
The lessons come from her own practice: the ten-minute drill on the Practice page is the routine she uses, and the software guides are written by opening Photoshop, Illustrator, Clip Studio, Affinity and Procreate and doing the thing, screenshots included.
She writes about drawing, tools and the slow work of learning to see on Substack. Questions, corrections and requests for a grid that does not exist yet go to the contact page.
How the grids are made
Each grid is a 3D scene (a ground plane, a ceiling plane, verticals and a one-metre reference cube) seen through a pinhole camera at eye height, rotated by the angles you set, with the field of view expressed as a 35 mm-equivalent lens. The linear grids use a standard perspective projection; the curvilinear grid uses an equidistant fisheye projection, so straight lines become arcs and the whole sphere fits the disc at 360°. Exports come from the same geometry, which is why the SVG is real vector data you can edit in Illustrator, Affinity or Inkscape. The formulas are on the calculator pages.
How the site is funded
It isn’t, yet. There are no accounts, no paid tier and no ads. If that changes, ads will only ever appear on lesson pages, never inside a tool, and this page will say so.
Privacy
Everything runs in your browser. Grids are drawn on your device, exports are created on your device, photos you open in the image tools never leave your device, and share links only contain the settings. Details are in the privacy policy.
Use
Free for personal, commercial and classroom use. If you teach with it, a link back helps other people find it. Found a mistake in a lesson? Email Sara and it will be fixed and dated.