pab BME BSDF gallery

reflective material models using the Ward "plastic" model as implemented in Radiance

ward_plastic.PI1002CRAP10.381	ward_plastic.aluA-elox1.378	ward_plastic.aluA-st1.379	ward_plastic.bme-fm-carpet1.351
ward_plastic.bme-fm-certile1.343	ward_plastic.bme-fm-chou1.344	ward_plastic.bme-fm-lam1.350	ward_plastic.bme-fm-lam2.352
ward_plastic.bme-fm-lam4.955	ward_plastic.bme-fm-lam5.966	ward_plastic.bme-fm-lam6.969	ward_plastic.bme-fm-mat2.353
ward_plastic.bme-fm-vinyl1.968	ward_plastic.bme-wall-algrey1.967	ward_plastic.bme-wood1.340	ward_plastic.bme-wp-beige.342
ward_plastic.bme-wp-wht.341	ward_plastic.diffgra1.960

reflective material models using the Ward "trans" model as implemented in Radiance

ward_trans.L02-148.387

ward_trans.vk_op10.380

ward_trans.vk_rsm220.384

reflective material models using the Ward "metal" model as implemented in Radiance, plus add-ons for fitting

These examples are a bit more advanced. These specular materials mostly have a "peak-ed" BSDF, nd a few not-so-specular materials have been added for comparison. To handle the data of these specular, ''shiny'', the fitting and visualisation process uses some added features:

• Angular resolution is increased around the peak, using an automatic adaptive algorithm during measurements.
• One parameter is kept constant during fitting: For metal, the first parameter defines the direct-hemispherical reflection ρ, which is first calculated from measurement data and then kept fixed during fitting of the model parameters.
• Extra degree of freedom for the peak position stabilises fitting of highly specular materials.
• The 3D and 2D plots are shown on a logarithmic scale on the Y-axis, otherwise the peak and the background scatter won't fit into the same plot. Click on the image to get data and plots for incident angles.

ward_metal_ps.PI1002CRAP10.381	ward_metal_ps.aluA-elox1.378	ward_metal_ps.anofol240.33.383	ward_metal_ps.anofol606.37.385
ward_metal_ps.bme-fm-chou1.344	ward_metal_ps.bme-fm-lam3.372	ward_metal_ps.bme-wm-certile2.374

Note: The photographs are for illustration. Model parameters are based on gonio-photometric measurements. For copyright and usage of data, see license.

Links: BME main page, technical details, model details