OctaneRender™ 4 RC 6

[MB]

OctaneRender™ 4 RC 6 -

Using the 'Batch Render Job' node in the above release with 'Save the denoised pass instead of the main beauty pass' option checked, I still get the main beauty pass written to disk.

[wallace]

This combination of sheen + coat + ior causes fireflies and reflection artifacts

universal_coat_sheen_fireflies.png

Hi funk,

Both problems you reported have been fixed, will be in the next version. They were basically floating point issues in implementation that caused some problems in some very specific cases, I have a solution to resolve these issues and have removed the fireflies you have found with coating + sheen + specular together.

Thanks,
Wallace

[funk]

Thanks Wallace

[J.C]

Universal with metallic set to 1 has reflection artifacts not seen in the metallic material

universal_metallic_artifacts.png

EDIT: Universal clearcoat seems to be affected by this too

I can confirm this bug too. It's clearly visible with Clear Coat layer.

[rodrsamuel]

hi! im having a problem on all octane 4 RC this problem persists on RC 6

i work with C4D Octane on large scenes arch viz projects and every time i enable out of core geo/textures i get cuda error 700 ilegal memory access

i have 7x evga ftw3 1080ti Hybrid with 2x evga 1600w power supply to have more than enough power on a ausus x99 e ws usb 3.1 motherboard.
msi on or off doesn't change anything, Gpu and Vram down clock doesnt do any diference. i have 64gb memory in my pc witch at least 50% is free with stock clock of 2133mhz
already unplugged GPUS one by one to check the hardware and the problem persists.
i dont know what else to try, lower parallel samples doesn't solve .
already used all drivers from 391.35

cheers

[calus]

They were basically floating point issues in implementation that caused some problems in some very specific cases

Hi Wallace, maybe this issue is also relative : In Universal Material, when coating IOR is 1 this disable transmission (even when coating is supposed to have no effect).

Also mixing diffuse and refraction should only be controlled with 1 attribute : the transmission color, not also the albedo color :
When transmission = 1, we can get a completely opaque material just because the albedo color is white :
It's confusing but also unpractical in production (2 different textures needed in 2 different attributes just to layer diffuse and refractive material ..)

Also while some unexpected feature are added ( IOR mapping ), some basic material component are still missing :
- Diffuse reflection roughness is missing ( look roughness effect in the Diffuse material )
- Diffuse transmission is missing (look transmission effect in the Diffuse material ) > we would need a "transluscency" attribute to switch from specular transmission to diffuse transmission.

[oscartung]

placement node seems to be broken

[hyperchris]

The Denoiser crashes on two identical machines (MacPro5,1 - 2x GTX 1080), but only if both GPUs are enabled for rendering or if the image resolution exceeds a certain amount.

I was already in contact with Beppe about this issue, but I have a general question concerning this topic:
Would it be somehow possible to render an image sequence first, and then run the Denoiser sometime afterwards? Like some sort of standalone Denoiser that loads previously rendered image sequences?
In this case we could render the images on both GPUs and run the Denoiser only on one GPU.

[Notiusweb]

So, just talking about upcoming stuff and later on...
As far as render speed will go, are there any more tricks up your sleeves that are going to make rendering even faster, or is it just now compatibility with newer RTX graphic cards that will be the driving force moving forward?

[abstrax]

hi! im having a problem on all octane 4 RC this problem persists on RC 6

i work with C4D Octane on large scenes arch viz projects and every time i enable out of core geo/textures i get cuda error 700 ilegal memory access

i have 7x evga ftw3 1080ti Hybrid with 2x evga 1600w power supply to have more than enough power on a ausus x99 e ws usb 3.1 motherboard.
msi on or off doesn't change anything, Gpu and Vram down clock doesnt do any diference. i have 64gb memory in my pc witch at least 50% is free with stock clock of 2133mhz
already unplugged GPUS one by one to check the hardware and the problem persists.
i dont know what else to try, lower parallel samples doesn't solve .
already used all drivers from 391.35

cheers

Thanks for the detailed report. And sorry for not having a helpful answer (yet), but we haven't seen this particular problem here yet and we don't have a setup that is comparable with yours. -> Some more questions first:

Does it happen with specific scenes or all scenes that use out-of-core memory? Do you get the render failure immediately or only after rendering some time? How much out-of-core memory do you use? Does it also happens if you render on less than 7 GPUs, like only 1 or 2 GPUs?