Skip to yearly menu bar Skip to main content


Eclipse: Disambiguating Illumination and Materials using Unintended Shadows

Dor Verbin · Ben Mildenhall · Peter Hedman · Jonathan T. Barron · Todd Zickler · Pratul P. Srinivasan

Arch 4A-E Poster #399
[ ]
Wed 19 Jun 10:30 a.m. PDT — noon PDT
Oral presentation: Orals 1B Vision and Graphics
Wed 19 Jun 9 a.m. PDT — 10:30 a.m. PDT


Decomposing an object's appearance into representations of its materials and the surrounding illumination is difficult, even when the object's 3D shape is known beforehand. This problem is especially challenging for diffuse objects: it is ill-conditioned because diffuse materials severely blur incoming light, and it is ill-posed because diffuse materials under high-frequency lighting can be indistinguishable from shiny materials under low-frequency lighting. We show that it is possible to recover precise materials and illumination---even from diffuse objects---by exploiting unintended shadows, like the ones cast onto an object by the photographer who moves around it. These shadows are a nuisance in most previous inverse rendering pipelines, but here we exploit them as signals that improve conditioning and help resolve material-lighting ambiguities. We present a method based on differentiable Monte Carlo ray tracing that uses images of an object to jointly recover its spatially-varying materials, the surrounding illumination environment, and the shapes of the unseen light occluders who inadvertently cast shadows upon it.

Live content is unavailable. Log in and register to view live content