This page displays some of the plant renderings I have achieved using the Entropy module for cpfg and the Entropy rendering software.
Below, a comparison of the lilac rendered under Entropy (top) and under Dali (bottom). Even though global illumination is turned on in the Entropy rendering, shadow areas are not properly illuminated without transmission of light through petals. The petals in the Dali rendering allow for transmission of photons, producing subtle shading effects in the darker areas. I have yet to figure out how to enable transmission of light for surfaces in Entropy.
These are sunflower models, built entirely of bicubic patches, rendered with Rayshade (top) and Entropy (bottom). Rayshade requires bicubic patches to be tesselated prior to rendering. As a result the fine details of the bicubic surface may be lost, and the tesselated surfaces have sharp, discontinous features (particularly noticable for the seeds). Entropy offers support for rendering bicubic patches without tesselation, resulting in surfaces as they were meant to be seen.
Renderings of an aspen tree, from far away and close up. Once I figure out proper shadow handling and global illumination in Entropy, it would be interesting to turn on these options.
A lupine illuminated by a spherical light source casting fuzzy shadows, rendered in approximately two hours.
This close-up shot of the buds on the lupine displays the accurate rendering of bicubic surface patches.
An aster with a velvet surface shader. I need to figure out what's causing the black concentric circles on the petals...
Rendering the aster gave me several problems. The petal surfaces have normals defined for their backside, and it appears that Entropy, by default, only shades the side of the face for which normals are defined. Hence, in the left image (below) the front sides of the petals do not get illuminated. My cheap solution for the image above was to specify two light sources on opposite sides of the plant. Entropy probably has a setting for shading both sides of a face - I just haven't discovered it yet. The right image has shadows turned on, but because of the problem with double-sided faces, the result is somewhat flaky...
The snowlily model with the velvet shader. The shader gives leaves have a much softer appearance.