Hi guys, the 8th daily version of the Corona for the cinema has already been released, and the problem that I wrote about back in 2019 is still present (https://forum.corona-renderer.com/Speed problems and corona bitmap problems )
The confirmation:
One cpu with no corona bitmap at materials, 9,7m rays actual
Are you planning to fix the render speed issue on dual-processor systems at all? If not, then at least add to the converter the ability to immediately convert all textures to the corona bitmap,because doing it manually takes a lot of time, thanks.
I tested in 3d max, even in 2019 everything was ok there with speed.
No UVW Randomizer or Triplanar there, only maps at diffure,reflect\gloss, bump.
There is no need in dropping this test scene for you, created in a couple of minutes, it’s just a set of simple geometric shapes, with sky and two materials, starting from 2019 with almost every assembly I create a similar test scene, and the result is always the same.
Just as a note, a scene is always handy, just in case some default render settings have been changed by a user etc. It’s always useful to know we are testing EXACTLY the same thing, and not something “close to” or “similar to” or “kind of like” the scene where a user has a problem. So sharing the scene would still be useful, thanks
On systems with one cpu everything is ok, it can be seen even by the fact that when I render with one processor (in the cinema settings I limit the number of threads so that the 2nd processor does not use) then everything is fine.
Created two test scenes, with and without bitmaps, uploaded as 1629289008_scenes-for-dual-cpu.zip. Hope this helps, thanks.
Hello,
For the guys of the corona team, this will probably be funny… But I just tested the 10th corona for c4d, and the problem with systems on 2 CPU remained…
Judging by the fact that I reported this problem back in 2019 (https://forum.corona-renderer.com/Speed problems and corona bitmap problems ), this bug is already more than 4 years old … Do you have plans to fix this?
i have also a few dual xeons in use, they not show any slow down for me, can you explain what you experience?
v10 runs fin here as expected, so it might ot be some general with 2 cpus.l
Try to make a test scene (like at the beginning of the topic) and check the rendering speed when the textures are loaded (diffuse, reflect, gloss, bump) with the corona bitmap and without the corona bitmap.
i have threadrippers with 1 CPU (32/64 cores) and dual xeons (56 cores),
they all behave as expected from speed as said.(also i test my machines always with Cinebanch and Coronabench.
thats why i asked
speed greatly depends on how file search path are set, disc speed/network speed of the machine and so on, also number of cpu cores cant be compared 1:1.
Please re-read this topic more carefully, also the topic to which I gave a link.
If you do not use a corona bitmap, then one processor renders faster than two (In the settings of the cinema 4d, there is a limit on the number of threads. I have a 2x2698v4 system. I set the limit to 40 threads). If the textures are loaded with the corona bitmap, then the rendering speed on two processors is ok.
But manually adding corona bitmap for each texture takes time… Why don’t they make a script for that? Or that the textures would immediately work as if through a corona bitmap? There are also problems with the corona bitmap itself, about which many topics have already been created.
“also number of cpu cores can’t be compared 1:1.”
That difference is almost 2 times, when using two processors, in comparison with one. If checked in render without textures, or when all textures are through corona bitmap.
It is incorrect to compare AMD and Intel in this case.
i do not use corona bits , or only rarely. speed is ok with our without here.
i have quite some Corona render experience, and it works very well for most things with the classic c4d bitmap.
modern systems (also single cpu threadrippers) can be 2x or even 3x and more faster than old dual xeon as you or i have,
best compare the cinebench values for example of both machines (to have a neutral comparance), so there a 2x speed difference is expected.
EDIT: on cinebench 15, the xeon you have a score of 2940 points, where the single threadripper has, dependent on model scores between 6000 and 10400 points, and intel i9 13900 has still more than 6000 points, more than double the speed as the dual xeons ( and i think it is valid to compare amd and xeons for render tasks, it is all about speed, amd cpus are just most times faster today for rendering)
this is due the progress modern cpus have made last years.
Why are you writing here about the difference between old xeons and new other processors? Topic about it?
I have a 5950x system, it is in terms of rendering speed like my system with two xenons. I use the xeon system as a node, but I can only use 50% of its capabilities.
Dual processor systems can give a lot of performance, and I have a desire to build a few more nodes, but this bug severely limits it.
“i have quite some Corona render experience, and it works very well for most things with the classic c4d bitmap.”
I didn’t just write that the bug was described back in 2019 … But it’s still not working.
Please report this as a support ticket here: https://support.chaos.com/hc/en-us/requests/new
Please attach any scene where you are able to reproduce the problem and add information about the version of Corona and Cinema 4D you are using, and the hardware you are using.
Thanks, we do have it reported indeed.
Which versions of Corona and C4D are you using?
Also, which OS and version?
And lastly, what are your exact hardware specs? What CPU model, how much RAM, what RAM configuration? (2 RAM sticks or more) Are you 100% sure that your RAM is installed correctly according to the motherboard manual?
I am sorry if you have already answered those questions in the past, but if you could do it once again, that would be great.
