Author Topic: Material Graph : can't assign color adjust card to bump channel  (Read 2850 times)

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Offline BenG075

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Material Graph : can't assign color adjust card to bump channel
« on: September 27, 2016, 09:44:41 am »
Hi,

I am exposing here an issue (maybe it is not), but when I try to assign the Color adjust card output to the bump channel of my material it doesn't...
I would like to use the same texture map as a starting point then adjust it to enhance its application according to the channel I want (Specular, Bump...). Please look snapshot attached.

Thanks for your help !

Benjamin

Offline Chad Holton

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Re: Material Graph : can't assign color adjust card to bump channel
« Reply #1 on: September 28, 2016, 05:51:17 am »
Based on your sample screenshot, the image used for bump mapping is basically converted to B&W and you wouldn't need color control.

Offline BenG075

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Re: Material Graph : can't assign color adjust card to bump channel
« Reply #2 on: October 12, 2016, 08:57:54 am »
Hi Chad, Thanks for feedback :)

I fact I want to use a modification node to increase the contrast between the white and the black area... keeping the same mapping parameters...
But it seems that's impossible here...

Offline richardfunnell

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Re: Material Graph : can't assign color adjust card to bump channel
« Reply #3 on: October 12, 2016, 10:29:00 am »
My suggestion is to simply copy/paste that node in your Material Graph (essentially duplicating it), and plugging it in where it needs to go. The "sync" option should be checked allowing you to move/scale as needed, but you can then adjust each texture or parameter as needed.

This usually leaves my material graphs a little cleaner, instead of double or triple duty-ing them. You may see issues when using the same texture in too many nodes.

Online MWo

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Re: Material Graph : can't assign color adjust card to bump channel
« Reply #4 on: October 13, 2016, 11:58:42 pm »
The limitation is that you can't assign an utility node to the bump channel of a material (but "backside color mask" utility node if experimental features are on)

maybe one release we get this control.

For now you can copy your texture file, change it with a graphic tool (like Photoshop or something similar) and use refresh in KeyShot to effect the bump.

Offline Chad Holton

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Re: Material Graph : can't assign color adjust card to bump channel
« Reply #5 on: October 14, 2016, 05:57:44 am »
Hi Chad, Thanks for feedback :)

I fact I want to use a modification node to increase the contrast between the white and the black area... keeping the same mapping parameters...
But it seems that's impossible here...


Hi Benjamin,

I haven't tested to see for sure but would think adjusting the bump height parameter would be the equivalent.

Chad