Hi guys, I’m having trouble rendering. Even simple things take very long.
So, I was working on a file and when I rendered at: 1600x1200 pixels @ 300 dpi and it told me it would take an hour to render… I decided to share the file here and see what times you are getting. If you have the time and energy to open the file and simply render it at the same settings, that would be great. It’s not about the final rendering, it’s just to get an idea of what times rendering of this file will take.
I am using a very fast Macbook Pro with a dedicated GPU but I am not noticing anything of it. Rendering a simple scene feels like doing it with a 16Mb Voodoo II from 1996.
When I render a different object with reflections and such, I get the render almost instantly. For example when I’m using the ‘gold’ texture on a bracelet I’ve designed.
I’m not sure if my computer is the problem.
In the file supplied, when I unlink the texture, the image renders fine within seconds. I was using the texture ‘beech’ to render. This causes the render to take around an hour. No texture = seconds. I think there is a problem with the renderer when you use textures?
Your model, while elegant in the joinery detail is quite simple and should render quickly. I opened the file and rendered in Flamingo on my windows machine. It did 72 passes in one minute. I changed the mesh settings to a level higher than I would normally but considering the simplicity of you model thought would pose a challenge. It rendered instantaneously on screen and I got 65 passes in one minute in Flamingo.
So, what is the problem with your scenario. Have you set your render meshes too high? Do you hear you laptop fan cranking up to cover the cpu load? If you don’t, then there is a problem there. Most renderings are cpu intensive; more so than gpu intensive.
Hi Rob, indeed, the fans speed up, I’ve checked the system core to see which programs use RAM, CPU and GPU, when Rhino is rendering it is using the CPU fully. Nothing wrong there. I guess there is an incompatability with Rhino when I’m rendering objects that use materials with textures.
What OSX version are you using? Also, what is the Mac hardware exactly. Sorry, if I’m missing this info here but I’m wondering if you are using OSX 10.9.5 specifically. Can you also check that the skylight is off when the rendering is calculated. This render property may not be transferring with the file you posted… it still renders in a couple minutes with the skylight on and the texture displayed here in 10.10.2 but I want to make certain what your setting is for the skylight. Without the skylight it’s 5 seconds like others reported.
Let me know all the info on your OSX version and hardware please.
I have looked at this and determined that this is a problem inside OS X 10.9.5. It likely also exists in OS X 10.8.5, but I did not check this. I ran the following tests on a mid-2013 MacBook Air using build 5A783w. Identical hardware and identical copy of Rhino software.
On 10.9.5, rendering the model in the first post takes 6 minutes 53 seconds.
On 10.10.2, rendering the model in the first post takes 6 seconds.
This explains the difference between your results and the results everyone else saw when rendering your model.
I traced into the rendering code, and the delay is entirely inside Apple routines (on 10.9.5) for manipulating bitmaps.
I tried to find some easy workarounds but was not successful.
At this point, I would suggest upgrading to OS X Yosemite to get much faster renders. We will look at this some more in the future, but the simple fix right now is for you to upgrade to Yosemite.
I’m also having problems with very long render times and long times to apply or change materilas. I’ve posted about this a number of times already, however I’m still researching the issue and prefer not to go into the details until I’m closer to isolating the problem.
One thing I have found though is that applying or changing a texture on a large file can take forever - often not being complete after eight or ten hours and requiring a restart.
However if I remove the object from the file and paste it into a new file I can apply or change the material instantly and then past back into the original model.
I aborted a rendering after one and half days and only 25% done. I rebuilt the model loading the surfaces into a new file one at a time. Now happily rendering in less than half an hour at 10x.
Lighting may be part or all of the problem, not sure.
Also running Yosemite. I wish Apple had stopped OS development at Snow Leopard. Looks like too many engineers with nothing useful to do.
Saving materials and getting multiple duplicates with wrong name seems to be problematic but not really affecting my work flow at this time.
Overall very happy with the potential of the new render engine.
Very interesting, do you think it could be possible for me to re-create the rendering problem you’re having? Would sharing a file work?
Now that I re-installed my machine to Yosemite, I’m quite curious to see if I get the same results as you. With the new system, the rendering of my own files is going very smoothly luckily. I was afraid that I was running into a hardware failure, something very frightening when you’re a student and don’t have any backup finance