I have been playing with cycles materials for a long time and have got fairly decent results - however recently I have been trying to get to a better level of realism and have realised that my use of colour in materials ins’t very realistic.
I tend to give highly coloured materials colour values near 1 - but this is not very realistic as it implies 100% reflection at that colour.
I have been looking up albedo values for common materials and that has lead me to conclude that I shouldn’t be making materials more than 70-80% reflective - even for very bright/reflective materials like fresh snow etc.
I’m trying to relate Cycles colour values to albedo - but have noticed that the colour values in cycles don’t appear to be linear (i.e. RGB 0.5, 0.5, 0.5 is not half as bright as 1,1,1).
Does anyone know what falloff is used for cycles colours and how this relates to albedo?
Edit: it’s ok - figured it out. Cycles colour sliders use a gamma of 2.2. Therefore in order to relate albedo to cycles colours - I need to add an RGB node - and run it through a gamma node set to 2.2. This will linearise the color and as such I can put the colour in directly as a percentage.