OctaneRender 3 for Revit [OBSOLETE]

[Sonnemanntoon]

CUDA error 2 on device 0: The API was unable to allocate enough memory to perform the requested operation.
-> failed to launch kernel (dl)
device 0: direct lighting failed

This looks like you are simply running out of VRAM, or it could be a hardware failure. Your video card is reporting that it's out of memory.

For example....

Code: Select all

CUDA error 2 on device 0: The API was unable to allocate enough memory to perform the requested operation.
-> failed to allocated device memory
device 0: failed to allocate film buffers

means Octane tried to access VRAM to allocate the render "output", but the card reported there was no memory available.

What hardware are you running pls? (suggest putting it in your signature). How much VRAM do you have? When it is rendering, what is the free/used/total statistics showing? Did that scene rendering in the Octane 2.16 version of the plugin OK?

Paul

Thanks for your reply Paul,
Specs:

HP
Processor: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHZ 3.60 GHZ
Ram: 12 GB
64 bit OS

And one slave same specs except processor that is 2.4 GHZ - funnily enough this one is actually generally able to run most of the renders and has far less error messages.

On 2.16 yes I was able to render these scenes but we were experiencing networking issues

Thanks

[face_off]

HP
Processor: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHZ 3.60 GHZ
Ram: 12 GB
64 bit OS

And what graphic cards do you have pls? re you using the rendering card are your display adapter?

Paul

[Sonnemanntoon]

HP
Processor: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHZ 3.60 GHZ
Ram: 12 GB
64 bit OS

And what graphic cards do you have pls? re you using the rendering card are your display adapter?

Paul

specs:
NVIDIA Quadro 4000
Chip type: Quadro 4000
4095 MB
Display mode: 1280x1024 (32 bit) (60Hz)

And sorry but I didn't understand the second part of your question?

Oh and memory used (displayed in octane window) : Used: 1718/ Free: 117 / Total: 2048 mb

Thanks

[face_off]

Oh and memory used (displayed in octane window) : Used: 1718/ Free: 117 / Total: 2048 mb

OK - you are running out of video card RAM. You have a 2GB card, and only 117Mb free - and when you increase the size of the render resolution it is getting to 0Mb free). The geometry and textures are loading into VRAM (video card RAM) ok, but then there is not enough memory for the final rendered image storage. Octane 2.21 will help a little with this - since you can store the texturemaps in normal RAM. However, for what you are doing, a 2GB card is probably too small. Also keep in mind, if you only have one card in your PC, and that card is also being used as your Windows display adapter, Windows will be using some VRAM, and Revit's OpenGL preview window will also be using VRAM. Turning on some Render Passes, and Post Processing in Octane will most probably also use up additional VRAM.

So, time to add some new hardware, or use small textures.

Paul

[Sonnemanntoon]

Right
Thanks for the response. What I don't get however is last year for example I was running renders on Vray with sketchup with far more complex textures and on a less powerful machine and I had no issues. I highly doubt my company would be willing to buy new graphics cards but what would you recommend?
Thanks

[face_off]

Thanks for the response. What I don't get however is last year for example I was running renders on Vray with sketchup with far more complex textures and on a less powerful machine and I had no issues. I highly doubt my company would be willing to buy new graphics cards but what would you recommend?

You'll need to check the Benchmark thread at http://render.otoy.com/forum/viewtopic.php?f=9&t=7144 to decide on a card (and the understand the speed different between your existing card and the potential new card). If you are running out of VRAM with 2GB, get at least 3GB. Leave your existing card in the PC as the display adapter.

Paul

[Seekerfinder]

Right
Thanks for the response. What I don't get however is last year for example I was running renders on Vray with sketchup with far more complex textures and on a less powerful machine and I had no issues. I highly doubt my company would be willing to buy new graphics cards but what would you recommend?
Thanks

Hi Sonnemann,
If you can wait till next month, I would recommend that since Nvidia should be announcing new cards. These are likely to be the next gen Titan cards, which have a lot of mem and are great for Octane. If you can't wait, I'd recommend getting a couple of GTX980's. They have 4gb (effectively around 3.5gb). If you can get hold of the GTX780 6gb, those are great - but they need more ventilation. An even better card would be an old Titan or Titan Black, but you're not likely to find those new anymore.

Best,
Seeker

[Sonnemanntoon]

Ok thanks, will look into it. For now I've been able to play around it by hiding bits and pieces of furniture and components.

I also had a question regarding some of the renders produced - We seem to be getting a very grainy feel to some of the images - for example when there is a little less lighting. It's as if the render hasn't completed when octane is saying it has.



Any idea as to why?

My default lighting in the scene is pretty strong and there are also a number of emissive textures (the recessed lights at the top of the walls) + natural lighting.

Thanks

[Sonnemanntoon]

And another question - I would like to create an effect in a glass texture. Was wondering how to emulate a bespoke bubbly type glass



Not the colour in this instance but the effect on the glass - as though it had been hand blown purposefully with those bubble.Its for a globe pendant light fixture.

Thanks

[face_off]

My default lighting in the scene is pretty strong and there are also a number of emissive textures (the recessed lights at the top of the walls) + natural lighting.

I suspect all those lighting in the side and middle of the ceiling are high-polygon Revit family geometry items and will not be ideal as emitter geometry for Octane and render with a lot of noise. In this case, you might be better turning the emission right down on those objects, and add a new object - being a single polygon for the whole ceiling - which you set opacity to 0 and set up as an emitter. This should give a much less grainy render. Other suggestions: Set caustic blur to 1, wait for the next release, and assign each light to a light pass - then render each light pass to determine which of those lights is rendering the noise. Also, you could remove the wall behind the camera so some daylight is added to the hallway and it will render better.

I would like to create an effect in a glass texture. Was wondering how to emulate a bespoke bubbly type glass

I think you would need to use a custom displacement map to vary the thickness of the glass - could be created in Zbrush. Or you could try something like the the Octane procedural textures (turbulence or marble) plugged into the specular or index pins of the glass material.

EDIT: plugging a turblulence into the Transmission pin seems to get a vaguely similar look to what you want.
EDIT 2: The photo you pasted has the globe has a hollow object - so you'll need to make sure the geoemetry of the orb you use is hollow too - is it is solid, Octane will render it as solid and it will look much different.

Paul