HtoA Domelight texures (Hdri) in Solaris not working

[schwungsau]

arnold CPU is working fine but as soon I switch to GPU the skydome goes white. I tried it with plugging directly tx files.

[schwungsau]

here is a screenshot

CPU

GPU

[pal.mezei]

Hey!

This is supposed to work. Could you share some more information? What are your settings on the dome light LOP? Your OS/Houdini/HtoA/driver version/GPU model?

[schwungsau]

Intel(R) Xeon(R) E-2276M CPU @ 2.80GHz (6 cores, 12 logical) with 130846MB

NVIDIA driver version 452.6 (Optix 60600)

GPU 0: Quadro RTX 5000 @ 1455MHz (compute 7.5) with 16384MB (15608MB available) (NVLink:0)

i've tried .hdr .tx ands exr files

[schwungsau]

it works in regular htoA renderview, but the Arnold stops after handful of samples --> not useable. see video
https://www.youtube.com/watch?v=UKKA9pmDo-g

[pal.mezei]

Thanks for the details. I still haven't been able to reproduce the issue. Could you share an example file that shows the issue?

[schwungsau]

no logs, no feedback... its happen in any scene also emty scene.

-download any free HDRi map,
-emty scene in Houdini / solaris,
-use the HDRi in a domelight

- turn on GPU.

[Anonymous]

I can confrim and repro this

I'm working in solaris. htoa 5.5.0.0. HDRI on a domelight renders white with GPU, fine with CPU

[Stephen.Blair]

Repro and logged as HtoA ticket #1598

[Anonymous]

Hi, I have the exact same issue when turning on the gpu in solaris:

NVIDIA GeForce GTX 1080

i7-6820HK

houdini-18.5.596/htoa-5.6.3.0/Arnold 6.2.1.1

[dan_day]

Hello, I was wondering is there was any updates on that? I'm getting the same issue, with houdini 19.0455, htoa 6.0.2.0. (as you can see the hdri is visible in the non rendered parts, it works with arnold cpu, but not GPU)

Windows 10 / Nvidia GTX 1080 studio driver 472.12 / i76820HK.

[andreskluge]

curious about this as well. it makes the gpu workflow very limited.

[schwungsau]

after some work in Solaris, i would prefer to update other features of HtoA, Solaris itself is un-usable for lighting and rendering.

[sebastianax22C3R]

I am still having the same issue, is there no fix?

[isagvs]

I finally found the FIX!

Go to the Dome light where you added the hdr image, go to the Arnold Tab> Contribuition session> and desable camera contribuition to 0.

Done!

[kober.peter]

 

The above FIX does nothing to address the problem with LightDome's texture not refracting properly. It only fixes the hdr dome background rendering black instead of the broken white/greyish color.

@Stephen.Blair What is the progress on this issue? After 2.5 years its still a problem. 

We are using arnold houdini 7.1.4.2. Please see attached GIF from solaris trying to render a transmissive sphere and a single dome hdr. Basically when switching from CPU to GPU the transmissive/refractive glass sphere and hdr dome background render white/greyish. The hdr DOES NOT refract at all.

CPU works

GPU broken

[kober.peter]

Unlike Solaris arnold I found that Maya arnold on the other hand behaves correctly and as expected.

Pls check out attached gif which demonstrates correct GPU to CPU switching in Maya.

One more thing I want to mention is while investigating the transmission dome issue in solaris I found that the Maya aistandardSurface material IOR behaves differently to solaris aistandardSurface material. Please see attached png picture

 

[kober.peter]

 

[Stephen.Blair]

---

@kober.peter wrote:

Unlike Solaris arnold I found that Maya arnold on the other hand behaves correctly and as expected.

Pls check out attached gif which demonstrates correct GPU to CPU switching in Maya.

One more thing I want to mention is while investigating the transmission dome issue in solaris I found that the Maya aistandardSurface material IOR behaves differently to solaris aistandardSurface material. Please see attached png picture

 

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Differences in transmission, in Solaris, are usually because the geometry is not double sided. By default, meshes in Solaris have their double-sided parameter turned off.

[kober.peter]

Thanks @Stephen.Blair . That fixes it.

What about the CPU to GPU switching HDR transmission bug which was logged by you as HtoA ticket #1598 a while ago. Did that get resolved?