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How extract color channel from Image Texture?
Posted: Mon Jul 06, 2015 5:23 pm
by R_Flash
Hi. Need a help. I have simple material with image texture in diffuse channel, but I need to extract Green Color channel from this texture for use as a mask in a Normal channel. Thanks!
Re: How extract color channel from Image Texture?
Posted: Tue Jul 07, 2015 10:48 am
by bepeg4d
Hi,
I think that the faster way is to get the green channel in PS or GIMP and use it in the amount channel of a mix texture node
ciao beppe
Re: How extract color channel from Image Texture?
Posted: Tue Jul 07, 2015 1:33 pm
by R_Flash
bepeg4d wrote:Hi,
I think that the faster way is to get the green channel in PS or GIMP and use it in the amount channel of a mix texture node
ciao beppe
Yes, but I need extract different channels from one texture for economy VRam memory, because I have big 8K textures. And adding each additional image to project will "eats" 256 mb of VRam.
Re: How extract color channel from Image Texture?
Posted: Tue Jul 07, 2015 2:21 pm
by bepeg4d
Ok, now is more clear why you need this, here is a possible solution, I have not played a lot but i think you can get what you want in this or similar way
ciao beppe
Re: How extract color channel from Image Texture?
Posted: Tue Jul 07, 2015 5:47 pm
by R_Flash
bepeg4d wrote:Ok, now is more clear why you need this, here is a possible solution, I have not played a lot but i think you can get what you want in this or similar way
ColorExtract.zip
Schermata 2015-07-07 alle 16.16.15.jpg
ciao beppe
Thanks a lot . I will test this method.
P.S. I find another method,but it has a big disadvantage. It uses C4D shader "Filter".