Displacement + bump trick

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Re: Displacement + bump trick

Postby whersmy » Sun Jun 21, 2015 12:03 pm

whersmy Sun Jun 21, 2015 12:03 pm
:o
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Re: Displacement + bump trick

Postby linvanchene » Tue Jun 23, 2015 2:07 pm

linvanchene Tue Jun 23, 2015 2:07 pm
Awesome discovery. :D

Thank you very much for sharing!
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Re: Displacement + bump trick

Postby Raoul » Thu Jul 02, 2015 2:48 am

Raoul Thu Jul 02, 2015 2:48 am
Hmm.. This doesn't seem to be working for me. I seem to get a lot of artefacts when used on more complex surface. Like a hand for example.
I'm using the mix material as suggested. It looks fine when placed on a simple cube but on more complex geometry it seems to start to get funky.
Any thoughts on a workaround and is this an issue likely to be fixed in the 3.0 update?
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Re: Displacement + bump trick

Postby Lewis » Thu Jul 02, 2015 6:02 am

Lewis Thu Jul 02, 2015 6:02 am
Hmm, for me it works without material Mixer node also. I tried (it's loose node on right bottom) both (with and without mixer node) and it looks exactly same. You even can plug in just one input for material mixer and leave amount at 0 ot 100% (depending which one you plugged) in and it still works, But this way it's one node less, or I'm missing something ?
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Re: Displacement + bump trick

Postby gordonrobb » Thu Jul 02, 2015 8:21 am

gordonrobb Thu Jul 02, 2015 8:21 am
In your example Lewis, are you certain (sorry to ask stupid question) that the bump is contributing. Does it look different with/without the bump input?
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Re: Displacement + bump trick

Postby Lewis » Thu Jul 02, 2015 8:38 am

Lewis Thu Jul 02, 2015 8:38 am
gordonrobb wrote:In your example Lewis, are you certain (sorry to ask stupid question) that the bump is contributing. Does it look different with/without the bump input?


Yes, those small noisy bumps are from noise procedural. If I disconnect bump then i get smooth sides of mountains/rocks.
Check the difference (sorry for watermark I've not activated license here at work machine since i have only GTX 660 so i don't really use it at work anyway so this is on Octane 2.16 demo in this example ;))
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Re: Displacement + bump trick

Postby gordonrobb » Thu Jul 02, 2015 1:36 pm

gordonrobb Thu Jul 02, 2015 1:36 pm
Hhm, Now see that confirms what I thought, that bump and displacement 'do' work. Why are folks saying it doesn't work?
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Re: Displacement + bump trick

Postby bepeg4d » Sat Jul 04, 2015 7:51 am

bepeg4d Sat Jul 04, 2015 7:51 am
hi Lewis,
what happen if you use a normal map with displacement?
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Re: Displacement + bump trick

Postby Lewis » Sun Jul 05, 2015 9:55 am

Lewis Sun Jul 05, 2015 9:55 am
bepeg4d wrote:hi Lewis,
what happen if you use a normal map with displacement?
ciao beppe


Hmm, good point, I've not tried/tested that but then agian why woud you need displacement and normal map in same time when normal map is just "faking" displacement effect ?
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Re: Displacement + bump trick

Postby gordonrobb » Sun Jul 05, 2015 10:17 am

gordonrobb Sun Jul 05, 2015 10:17 am
I thought normal was used (sometimes) as better bump. I have models that have displacement and normal (rather than bump). Havent' set them up for octane though
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