OTOY Forums

hello everyone, I wanted to ask you a information.
How you use the Kernel material ID channel?
I find it really bad, the colors are always too similar to each other and not customizable!
maybe i'am negated to use photoshop, but how to select a color, always too similar to each other as the colors green in the attached file?

Please help me..bye

Select > Color Range - with the help of this You should be able to accurately select colors and use the selected information creating mask for postwork =)

Cheers

I'm having similar issues. Even if I can isolate the color "ok" in nuke, it gets difficult with motionblur and dof to get it as good as a pure aplhachannel. With other renders I use a surface shader in R, G and B, or a constant. A shader that does not take light into consideration, and renders really fast. (just like the ID pass.) But there is no shader like that in octane? or am I'm missing something? If they don't exist, pleas add them, as we often get requests from compositors for special masks, that cannot be done with the ID pass.

Cheers

Martin

there's a great plugin over at eat3d.com called rgbcmyw_splitter_remove_aa that is a photoshop action. It splits each color into it's own layer. You might want to give it a try. See if it works.

Rob49152 wrote:there's a great plugin over at eat3d.com called rgbcmyw_splitter_remove_aa that is a photoshop action. It splits each color into it's own layer. You might want to give it a try. See if it works.

Thank you for the tip, I will check it out. I work with animations though, so a solution that would work with long sequences in ie Nuke would be optimal.

Cheers

Martin

I tried the action that you suggested, but the results as it is the same(color range in Photoshop)!
You can not select just what you want!
In my opinion it is a useless tool (kernel material ID) so com 'is now .... if I want to select a green color, I can not, if there is a green light in the same scene ... Photoshop will select both (color range in Photoshop)!
So you are unable to work, is a useless tool (kernel material ID)!

See the attachment!!!!

I might not understand this, but I could be the case where it's not the tool to blame, but the one who is using it. Try this:

thanks a lot, i will try this metod!! if i need help can contact you?
B&W filter where i can find?

Great and thanks!!!

You can create a mini video tutorial?