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Questions tagged [radiance]

Radiance is a suite of programs for the analysis and visualization of lighting in design.

Radiance is a suite of programs for the analysis and visualization of lighting in design.

Input files specify the scene geometry, materials, luminaires,time, date and sky conditions (for daylight calculations). Calculated values include spectral radiance (ie. luminance + color), irradiance (illuminance + color) and glare indices. Simulation results may be displayed as color images, numerical values and contour plots.

The primary advantage of Radiance over simpler lighting calculation and rendering tools is that there are no limitations on the geometry or the materials that may be simulated.

Radiance is used by architects and engineers to predict illumination, visual quality and appearance of innovative design spaces, and by researchers to evaluate new lighting and daylighting technologies.

You should be using this tag if your question is related to the use of Radiance tool suite.

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Analyzing cause of performance regression with different kernel version

I have come across a strange performance regression from Linux kernel 3.11 to 3.12 on x86_64 systems. Running Mark Stock's Radiance benchmark on Fedora 20, 3.12 is noticeably slower. Nothing else is changed - identical binary, identical glibc - I…
Chris
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weird direct illumination in custom problem

I am currently implementing a custom ray tracing renderer and I am stick with problem of direct illumination Here my result : normalOnLight sphereNormal max(normalOnLight.dot(sphereNormal), 0.0) I do not understand the last result, i think the…
Benzait Sofiane
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Is there a "Hello world!" example for radiance?

I have been reading about radiance for a few days, but still have not come across what appears to me as a really simple example. Is it possible to run something with a single light source and a single surface? What would be the simplest example…
adr
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How to add the color space information to a Radiance HDR format file created using "imwrite" in OPenCV

I have converted an HDR image in RGB color space to CIE-XYZ color space with "cvtColor" function, and then written the image to a Radiance HDR file using "imwrite" function. However, the header of the Radiance HDR file still says…
Jiaweikodomo
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Using Skylight as light source in Bidirectional path tracing

Is it possible to use bidirectional path tracing to render an indoor scene where the light source is skylight(no sun) coming through a window? I think I roughly know how this is done if the light source was the window rectangle itself acting as a…
ali
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Run C application on OpenCL using Java - possible?

I only have knowledge of Java for NeuralNetworks, GAs and some graphical interfaces work. I have a simple question that is about what is possible with OpenCL + Java + C. I know you can run C in Java, however what I would like to do is run a third…
p.drewello
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