Using Displacement with skin texture in arnold (Houdini)

[Anonymous]

How to get displacement maps (tif) working with Arnold in Houdini? I am using "Arnold_vopnet" and iside it i have standard surface shader that i am trying to use. (tried it with also old depcrecated skin shader) but could not get it work as i need it. Below is nodegraph image and also video where i try to explain what happens. I was looking also at arnold documentation but could not find solution. This: https://docs.arnoldrenderer.com/display/A5AFHUG/Displacement And this: https://docs.arnoldrenderer.com/pages/viewpage.action?pageId=38830536 The speak there about "Depending on the type of input, the displacement can occur in two ways: Float, RGB & RGBA inputs will displace along the normal while a vector input will displace along the vector." But i dont know what node to use for displacement then? Note i did try also with exr format and had same issue.
Please copy this youtube link and see what is wrong.
https://www.youtube.com/watch?v=K7XYeVbRzdA&feature=youtu.be

[Anonymous]

Hi
You are not getting displacement simply because you object has no UV. Try to add uvflatten for example and you get all displacement working

[Anonymous]

Object has UV-s. Using UDIM-s. UV-s were created in Unfold 3D.
Yes UV-s not perfect and i have to re-do those but they are there.

https://www.youtube.com/watch?v=3oH_e6jRkpE&feature=youtu.be

[Anonymous]

You can test displacement with as simple sphere if it work then your mesh has some pb maybe flipped normal...

[Tanel_Vaik1]

Issue is not with the model. It worked just fine with redshift

[Anonymous]

as I told you you have to test displacement with a simple test scene for debugging. if you get displacement working then the pb is not arnold displacement but something else maybe at export level from other soft
here is arnold displacement wroking

and here is the sahder

[Anonymous]

Well basically you poked in displacement also in to base color (i dont get it why)
I do not need colors from displacement as it will not be base color of my model
Sry but i am trying to do shader FIRST time. So i dont get what is pb
And mesh CAN`t have flipped normal as SAME MESH AND SAME TEXTURES worked fine with redshift renderer.

[Anonymous]

Here is update on issue.
Please take a look at short video i recorded with OBS
Displacement works when i leave subdivision Iterations to 1 in geometry node arnold tab.
But instantly when i increase it (to get more detail) i get gray render.
I atm exported out as exr from Mari.

https://www.youtube.com/watch?v=2fdACD704Ao&feature=youtu.be

[ashley.handscomb.retallack]

Hi Tanel,

With the subdivision issue, more than likely you are using a very dense mesh and are running out of memory.

In the diagnostics, if you set the log verbosity to "info" you will get more detailed output and it should show you wheer you are getting issues.

[Anonymous]

HWen i start houdini i get this:
00:00:00 52MB | [rlm] error initializing license system: 00:00:00 52MB | [rlm] * Can't read license data (-102) 00:00:00 52MB | [clm] license server was not set (51) 00:00:00 52MB | [rlm] solidangle_LICENSE = (not set) 00:00:00 52MB | [rlm] RLM_LICENSE = (not set) 00:00:00 52MB | [clm] ADSKFLEX_LICENSE_FILE = (not set) 00:00:00 52MB | [clm] LM_LICENSE_FILE = (not set)

(I am using non licenced arnold) has watermarks.
As i wanted to see what result i can get with Arnold before i buy it.

When i now increase Iterations to 2 for example. I get:

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2540MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1012.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2541MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1011.tx" 00:00:07 2541MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1013.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2541MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1012.tx" 00:00:07 2541MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1013.tx" 00:00:07 2541MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1014.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2541MB | [htoa.texture] AiMakeTx G:/Project Kerrigan 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--format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2542MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1023.tx" 00:00:07 2542MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1031.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2543MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1024.tx" 00:00:07 2543MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1032.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2543MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1031.tx" 00:00:07 2543MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1033.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2543MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1032.tx" 00:00:07 2543MB | [htoa.texture] AiMakeTx G:/Project Kerrigan Textures/Displacement\Displacement.1034.tif -v -u --unpremult --oiio --format exr -d half --colorconvert "sRGB" "linear" 00:00:07 2543MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1033.tx" 00:00:07 2543MB | [AiMakeTx] maketx: no update required for "G:/Project Kerrigan Textures/Displacement\Displacement.1034.tx" 00:00:07 2539MB | [htoa.texture] Converted 0 textures in 0:00:00.02 (64 skipped, 0 errors) 00:00:07 2531MB | [ass] writing scene to c:\users\tann\appdata\local\temp\houdini_temp\htoa_Tann\6296_918bf60b-3d81-497d-bdd7-674dc7b46a0e.ass (mask=0xFFFF) ... 00:00:07 2571MB | [ass] wrote 188573675 bytes, 18 nodes in 0:00.76 00:00:07 2531MB | 00:00:07 2531MB | releasing resources 00:00:07 2530MB | Arnold shutdown
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and render was gray again long time but then suddenly it loaded.

And tested that if i increase the iteration more it stays gray longer (still gray, hoping it will render).

What is that lag before it actually starts to render?

I have 128 gb DDR4 CL14 timing ram
And AMD Threadripper 1950x

[lee_griggs]

There is a displacement example scene here. A Vector Map example here.