A nondeterministic reconstruction approach for isotropic reflectances and transmittances

Physically and biologically based reflectance and transmittance models add realism to image synthesis applications at the expense of a significant increase in rendering time. Current research efforts in this area focus on developing practical solutions to quickly access a BDF (which represents a combination of BRDF and BTDF) while preserving its original characteristics. An approach to reconstruct arbitrary isotropic BDFs is presented. The spectral curves obtained using the proposed approach are compared with measured spectral curves, and some issues regarding its performance and storage requirements are examined.