6 modules - PI-VR GmbH

6 MODULES198spectral information for the color channels of materials and light sourcescan be provided and edited by opening the respective color dialogs. Inthe color dialog, activate the ”Spectrum” tab to gain access to the spectraldata. To enable spectral input data for a color channel, activate the”Use Spectrum” checkbox. The plot area displays the spectral distributiondepending on the settings to the right.· Spectrum:· File: Allows loading and saving a spectral distribution to a file basedon the settings in this window.· Red/Green/Blue: Allows computing spectral data from RGB inputvalues.· Scale: Rescales the photometric value of a spectrum by changingthe value V of a spectrum while keeping the hue H and saturationS constant.· Edit Sample Distribution: Allows setting the number and distribution ofspectral samples in the spectral domain. Note: Changing the sampledistribution will only take effect after pressing ”Apply”.· Presets: Choose from a collection of predefined settings suitablefor most use cases. Sampling spectra between 380 and 730 nm iswidely considered sufficient to capture the perception of light byhuman observers.· Allow Non-Uniform Sample Distribution: Allows editing the samplewavelengths of the spectral samples individually.· Start: The wavelength of the first spectral sample of the distribution.· Delta: The distance between the samples to be created.· Number: The number of samples to be created.• Optimize for Many Light Sources: In scenes with many light sources orgeometry light sources rendering may slow down. Activating this flagallows the renderer to optimize the light calculation by reducing the quality