Aging and imperfections provide important visual cues for realism. We present a novel physically-based approach for simulating the biological aging and decay process in fruits. This method simulates interactions between multiple processes. Our biologically-derived, reaction-diffusion model generates growth patterns for areas of fungal and bacterial infection. Fungal colony spread and propagation is affected by both bacterial growth and nutrient depletion. This process changes the physical properties of the surface of the fruit as well as its internal volume substrate. The fruit is physically simulated with parameters such as skin thickness and porosity, water content, flesh rigidity, ambient temperature, humidity, and proximity to other surfaces. Our model produces a simulation that closely mirrors the progression of decay in real fruits under similar parameterized conditions. Additionally, we provide a tool that allows artists to customize the input of the program to produce generalized fruit simulations.
Joseph T. Kider Jr., Samantha Raja, Norman I. Badler,
"Fruit Senescence and Decay Simulation"
Eurographics 2011 (PDF)
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FIGURE 2: Simulation results of a tomato and an orange under three different parameter settings
set by three users from our user-interface. Simulation (a) and (b) set two different pressure points
and produce different results. (c) changes parameters in the mold growth to simulate different
The authors would like to thank NVIDIA for the donation of the
graphics hardware, and thank Autodesk for their donation of Maya.
The authors wish to acknowledge Michelle Chen's preliminary artistic
studies on this topic, and Alla Safonova for all our helpful discussions.