  We present a novel extension of the path tracing algorithm that is capable of
treating highly scattering participating media in the presence of fluorescent
structures. The extension is based on the formulation of the full radiative
transfer equation when solved on a per-wavelength-basis, resulting in accurate
model and unbiased algorithm for rendering highly scattering fluorescent
participating media. The model accounts for the intrinsic properties of
fluorescent dyes including their absorption and emission spectra, molar
absorptivity and quantum yield and also their concentration. Our algorithm is
applied to render highly scattering isotropic fluorescent solutions under
different illumination conditions. The spectral performance of the model is
validated against emission spectra of different fluorescent dyes that are of
significance in spectroscopy.
