Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: MircoTosti Studio on 2017-10-11, 14:40:22

Title: albedo function
Post by: MircoTosti Studio on 2017-10-11, 14:40:22

Hi guys, who tells me how do I use albedo tables with texts and / or colors I've seen posted in this forum ?!
example:
 - natural silk fabric - 0.35-0.55 [M]
 - galvanized steel - 0.24
 - Green grass, 0.25
 - White acrylic paint, 0.8
 - black soil (wet) - 0.02-0.05 [D-S]

... etc..

how do I use these values and how do I apply them to a particular texture or color in corona material?

thanks in advance at all

Title: Re: albedo function
Post by: Juraj on 2017-10-11, 15:11:46

Albedo from scientific measurements always refer to full albedo reflection (specular + diffuse).

So for non-metallic materials, this is pretty much your direct linear multiplier value for diffuse albedo. ( example 0.5 means 128 RGB(linear)=186 RGB(sRGB/2.2gamma) ). If you use CoronaColor picker, the values are in sRGB/2.2 space.
For metallic materials, this refers to specular reflection albedo only.