Diffuse, specular, IOR, fresnel

Hi all

Some learners may find this helpful. I came across it whilst trying to understand stuff!

It's not from articad, but it explains terms

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To the experts, please feel free to comment if anything's not appropriate.

This tutorial talks about reflection using a colour value as opposed to specular. Do you know whether the specular scale is linear (0-1)?

Thanks

Steve

Steve

Specular is reflection..... You will notice some of us have enabled the Advanced Reflection settings so we have more control using colour for metals like Brass and Copper and Texture maps so we can have varying reflections for the likes of wood grains, antique mirrors etc.

I have studied various Vray materials and we can only use them as a very basic reference.

For a start Vray has many more parameters than RedSDK and also the Glossiness in RedSDK is not linked with the IOR as it does not use a microfacet roughness shader model.... This is one of the reasons I have been developing the Sheen Calc to mimic what happens when the glossiness increases spreading out Reflections (Specular) highlight lobes.

The default Specular Value in ARtiCAD is based on RGB Greyscale.... 0 = 0RGB, 1 = 255RGB. This is linear. 

What is not linear in RedSDK is the Glossiness so the Calculator graduates the two extremes.

Thank you Daz

If you want to turn on the Advanced Reflection Settings see here -  [You must be registered and logged in to see this link.][/url]

Thanks mate

Hi Guys, 

Is there a chance of updating the instructions on how to enable the advanced settings? The KFF link is no longer working unfortunately. 

Cheers

Open the ArtiCAD folder on your hard drive and scroll down to the Config file, click to enter and then scroll down to Advancedreflectionsenabled and type yes. Save and exit.