Bump Mapping Discussion

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Racleborg
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Bump Mapping Discussion

Post by Racleborg » Tue Jul 02, 2019 6:24 am

This topic was split from viewtopic.php?f=5&t=1080&p=14284#p14230
- B.Y.O.B.

wasd wrote:
Sat Jun 29, 2019 3:35 pm
Currently, bump doesn't work at all, so I propose to replace it with something.
For example:
https://jo.dreggn.org/home/2017_normalmap.pdf

Also, there's this paper and sample code for thin film interference:
https://www.ci.i.u-tokyo.ac.jp/~hachisuka/mcp.pdf
https://www.gamedev.net/articles/progra ... ics-r2962/
Am I missing something here as I don't have a problem with the BUMP node unless my project dimension UNITS are setup wrong? Plugging the map into the BUMP HEIGHT, instead of the VALUE input, solves this for me. :)

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epilectrolytics
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Re: Material/Texture rework in v2.3

Post by epilectrolytics » Tue Jul 02, 2019 6:49 am

wasd wrote:
Sat Jun 29, 2019 3:35 pm
Currently, bump doesn't work at all
In general I get it working with matte but not with glossy material.
MBPro 15" 16GB i7-4850HQ GT750M, MacOS 10.13.6 & Win10Pro PC 16GB Ryzen 2700X, 2 x RTX 2070

Racleborg
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Re: Material/Texture rework in v2.3

Post by Racleborg » Tue Jul 02, 2019 7:04 am

by epilectrolytics » Tue Jul 02, 2019 7:49 am

wasd wrote: ↑Sat Jun 29, 2019 4:35 pm
Currently, bump doesn't work at all
In general I get it working with matte but not with glossy material.
This is what I'm getting. I think both look ok to me? (attached)
Attachments
Glossy Bump.JPG
MATTE BUMP.JPG

wasd
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Re: Material/Texture rework in v2.3

Post by wasd » Tue Jul 02, 2019 8:10 am

Racleborg wrote:
Tue Jul 02, 2019 7:04 am
by epilectrolytics » Tue Jul 02, 2019 7:49 am

wasd wrote: ↑Sat Jun 29, 2019 4:35 pm
Currently, bump doesn't work at all
In general I get it working with matte but not with glossy material.
This is what I'm getting. I think both look ok to me? (attached)
Random patterns are bad for checking bump, because you don't know what to expect.
CPU Bidir + Metropolis | Log Power | Core i5-4570

wasd
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Re: Material/Texture rework in v2.3

Post by wasd » Tue Jul 02, 2019 8:24 am

Racleborg wrote:
Tue Jul 02, 2019 6:24 am
wasd » Sat Jun 29, 2019 4:35 pm
Plugging the map into the BUMP HEIGHT, instead of the VALUE input, solves this for me. :)
Well, maybe inconsistency in height map caused by misconnected inputs.
But I'm not talking there about height map only. If you're using normal map, result is bad anyway. You can check with cycles for example, which doing bump well.
CPU Bidir + Metropolis | Log Power | Core i5-4570

Racleborg
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Re: Material/Texture rework in v2.3

Post by Racleborg » Tue Jul 02, 2019 11:14 am

y wasd » Tue Jul 02, 2019 9:24 am

But I'm not talking there about height map only. If you're using normal map, result is bad anyway. You can check with cycles for example, which doing bump well.
Thank you for the info, I'll be more aware of these possible issues in future projects.

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epilectrolytics
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epic recreation fail

Post by epilectrolytics » Tue Jul 02, 2019 1:56 pm

Racleborg wrote:
Tue Jul 02, 2019 7:04 am
This is what I'm getting. I think both look ok to me?
Indeed!
Though a value of 1 is quite extreme (probably means 1m bump depth) but nonetheless.

I remember two projects from last week where bump glossy failed me and have just tried to reconstruct them from memory but I couldn't!
Everything just works, as if secretly fixed in the meantime!
Screenshot.jpg
I vaguely remember there were roughness maps too so it could have been a no bump but roughness problem.
Another one was probably metal, not glossy.

This is so confusing!
Can someone tell me please if I'm supposed to be happy or angry now??
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Racleborg
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Re: Bump Mapping Discussion

Post by Racleborg » Tue Jul 02, 2019 3:37 pm

Unread post by epilectrolytics » Tue Jul 02, 2019 2:56 pm

This is so confusing!
Can someone tell me please if I'm supposed to be happy or angry now?
"Don't worry. Be Happy" Bobby McFerrin. September 1988

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epilectrolytics
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Re: Bump Mapping Discussion

Post by epilectrolytics » Tue Jul 02, 2019 6:12 pm

Sound advice :D
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