Hi all,
Here's a little test render with the new pmc kernel in 2.47+,
using dispersion on the glass bolts. (scene is by dave62, it's in our new testsuite)
It's raw output from octane, no post-proc.
The cauchy B parameter for dispersion is too high though, 0.1, it's not something any realistic materials would have, I just wanted to see as much dispersion as possible.
Radiance
PMC dispersion bolts test
Forum rules
Important notice: All artwork submitted on our public gallery forums gallery forums may or may not be used by OTOY for publication on our website gallery.
If you do not want us to publish your art, please mention it in your post clearly. (put a very red small diagonal cross in the top left corner of the image)
Any images already published on the gallery will be removed if the original author asks us to do so.
We recommend placing your credits on the images so you benefit from the exposure too, and use a minimum image width of 1200 pixels, and pathtracing or PMC. Thanks for your attention, The OctaneRender Team.
For new users: this forum is moderated. Your first post will appear only after it has been reviewed by a moderator, so it will not show up immediately.
This is necessary to avoid this forum being flooded by spam.
Important notice: All artwork submitted on our public gallery forums gallery forums may or may not be used by OTOY for publication on our website gallery.
If you do not want us to publish your art, please mention it in your post clearly. (put a very red small diagonal cross in the top left corner of the image)
Any images already published on the gallery will be removed if the original author asks us to do so.
We recommend placing your credits on the images so you benefit from the exposure too, and use a minimum image width of 1200 pixels, and pathtracing or PMC. Thanks for your attention, The OctaneRender Team.
For new users: this forum is moderated. Your first post will appear only after it has been reviewed by a moderator, so it will not show up immediately.
This is necessary to avoid this forum being flooded by spam.
That looks great man.
What sort of render times should we expect once you've optimised it? Will it be faster than path tracing?
What sort of render times should we expect once you've optimised it? Will it be faster than path tracing?
Win10 Pro / Ryzen 5950X / 128GB / RTX 4090 / MODO
"I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live" - Jesus Christ
"I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live" - Jesus Christ
that looks really clean.
I left it running overnight, and in the morning it was finished at 16000/16000.
I don't know when it was done though, and forgot to check... (should have taken a screenshot too...
)
It looked pretty clean after on hour though, i'm sure 2 hours would have been more than enough, and I used one GTX460 GPU.
We're still working on optimizing the PMC kernel, at this time it's difficult to predict, but I'm hoping we can get 2x speedup after the optimizations are finished,
in a few weeks with the big beta 2.5 release.
Bidirectional pathtracing (and PMC) should make renders like this one converge MUCH faster,
and bidirectional pathtracing + PMC is something we will be starting work on next, after 2.5 is out.
PMC + bidirectional will be ideal, it will be as efficient as the popular standard in CPU based unbiased engines (MLT+bidir),
and this combines with the power of GPUs should really take things to a new level.
Radiance
I don't know when it was done though, and forgot to check... (should have taken a screenshot too...

It looked pretty clean after on hour though, i'm sure 2 hours would have been more than enough, and I used one GTX460 GPU.
We're still working on optimizing the PMC kernel, at this time it's difficult to predict, but I'm hoping we can get 2x speedup after the optimizations are finished,
in a few weeks with the big beta 2.5 release.
Bidirectional pathtracing (and PMC) should make renders like this one converge MUCH faster,
and bidirectional pathtracing + PMC is something we will be starting work on next, after 2.5 is out.
PMC + bidirectional will be ideal, it will be as efficient as the popular standard in CPU based unbiased engines (MLT+bidir),
and this combines with the power of GPUs should really take things to a new level.
Radiance
Win 7 x64 & ubuntu | 2x GTX480 | Quad 2.66GHz | 8GB
- Jaberwocky
- Posts: 976
- Joined: Tue Sep 07, 2010 3:03 pm
radiance wrote:I left it running overnight, and in the morning it was finished at 16000/16000.
I don't know when it was done though, and forgot to check... (should have taken a screenshot too...)
It looked pretty clean after on hour though, i'm sure 2 hours would have been more than enough, and I used one GTX460 GPU.
We're still working on optimizing the PMC kernel, at this time it's difficult to predict, but I'm hoping we can get 2x speedup after the optimizations are finished,
in a few weeks with the big beta 2.5 release.
Bidirectional pathtracing (and PMC) should make renders like this one converge MUCH faster,
and bidirectional pathtracing + PMC is something we will be starting work on next, after 2.5 is out.
PMC + bidirectional will be ideal, it will be as efficient as the popular standard in CPU based unbiased engines (MLT+bidir),
and this combines with the power of GPUs should really take things to a new level.
Radiance
That sounds great.......More speed.......I love speed........
Careful radiance...don't feed the zombies.


CPU:-AMD 1055T 6 core, Motherboard:-Gigabyte 990FXA-UD3 AM3+, Gigabyte GTX 460-1GB, RAM:-8GB Kingston hyper X Genesis DDR3 1600Mhz D/Ch, Hard Disk:-500GB samsung F3 , OS:-Win7 64bit
So is bidirectional path tracing like an add on or a modified version of path tracing?radiance wrote: Bidirectional pathtracing (and PMC) should make renders like this one converge MUCH faster,
Radiance
What is the difference between the two?
Win8 Pro 64bit ULT|Intel Core i7 3930K|3.20 GHz|32 GB RAM|GTX 590|UD5 2011 socket||2x TB HD||Master Cooler HAF X||Blender 2.6||Maya 2012||Octane|
It's a more complex algorithm, it's also unbiased, produces the same result (if implemented properly),radiant wrote:So is bidirectional path tracing like an add on or a modified version of path tracing?radiance wrote: Bidirectional pathtracing (and PMC) should make renders like this one converge MUCH faster,
Radiance
What is the difference between the two?
but is more efficient for caustics and hidden lightsources, as it traces rays from lights and from the camera,
and interconnects them.
It's quite complex to implement, and requires a complete foundation, which we now have.
It can also be combined with PMC to make it even better.
Radiance
Win 7 x64 & ubuntu | 2x GTX480 | Quad 2.66GHz | 8GB
That sounds so good!
Q6600 || 4GB || 9800GT || 512MB || Vista Home || C4D 9.6 & Blender