This is very similar to an annoying (very annoyingProupin wrote:About the overbright areas getting aliased edges, are you working on a solution?
) problem for VRay, with sub-pixel mapping OFF.Evermotion Scene revesion
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.
) problem for VRay, with sub-pixel mapping OFF.
I was going to point out that; Vray does have a solution for this, even if it means losing ranges beyond 255. The sub-pixel option you mention, caps all subpixels that go beyond 255, so the resulting pixel does not outshine neighbours.
Also, with the introduction of glow/glare, overbright areas get some glow that does spill to neighbour pixels to cover up this jagginess... when it was introduced by Chaosgroup they pointed out glow could be used to address this.
Grabriele, the problem lies with sub-pixels being out of range, and creates such a contrast with neighbouring pixels there's no filter size that can smooth that (without smudging the whole image that is - see edit) The only realistic solution is to be very careful on not using too powerful emmiters that are visible from camera/reflections... if the scene allows. If you HAVE to have such powerful emmitters and they are in the shot, you're out of luck.
edit:
This is a little test of what happens in overbright areas even if you raise the filtering to 4. Results: completely blurred render, overbright pixels get scattered by filtering.
Also, with the introduction of glow/glare, overbright areas get some glow that does spill to neighbour pixels to cover up this jagginess... when it was introduced by Chaosgroup they pointed out glow could be used to address this.
Grabriele, the problem lies with sub-pixels being out of range, and creates such a contrast with neighbouring pixels there's no filter size that can smooth that (without smudging the whole image that is - see edit) The only realistic solution is to be very careful on not using too powerful emmiters that are visible from camera/reflections... if the scene allows. If you HAVE to have such powerful emmitters and they are in the shot, you're out of luck.
edit:
This is a little test of what happens in overbright areas even if you raise the filtering to 4. Results: completely blurred render, overbright pixels get scattered by filtering.
- Attachments
-
- octane doesn't care about your filtering settings bra, we're trying to work with absurdly out of range pixels here!!
Win 7 64bits / Intel i5 750 @ 2.67Ghz / Geforce GTX 470 / 8GB Ram / 3DS Max 2012 64bits
http://proupinworks.blogspot.com/
http://proupinworks.blogspot.com/
-
gabrielefx
- Posts: 1701
- Joined: Wed Sep 28, 2011 2:00 pm
ok now I understand what you mean, antialiasing doesn't work on overexposed objects (mesh emitters)
Probably a clamp tool could help, I always used it in vray + subpixel mapping.
Probably a clamp tool could help, I always used it in vray + subpixel mapping.
quad Titan Kepler 6GB + quad Titan X Pascal 12GB + quad GTX1080 8GB + dual GTX1080Ti 11GB
I know a little bit VRay ehehe )))
Sub-pixel mapping in the first version of VRay was hide and, by default, ON. Clamp was exposed.
But, after the 1.46 (or 1.47) Vlado exposed this parameters.
With sub-pixel OFF, we have a better rendering, more realistic highlight, but the rendering time, sometimes (in the interior), is x5!!!
So, if you had a rendering in 3 hours, now, with sub-pixel off, you can easily have a 15-20 hours rendering (BF+LC) Crazy!
I fight every day with Sub-pixel and noise in VRay. But, with our little renderfarm, is not possible turn on Sub-pixel mapping.
But this is not enough, sometimes. If you have bright object or hight light contrast shader, you have equally some artifacts, like jagged edges.
And this is a big problem! So, I must clamp output. Sometime 4-5 is enough, sometimes not.
But this is for a producer render
If we talk about VRay-RT we have two different solution CPU and GPU. In the last version, Vlado, for solve this boring and very annoying problem,
only in the GPU version added a "filter" that "blurred" the final output.
But with strong highlight, the new filter (no option for this filter now. It's on by default and hide) this not solve the jagged edges.
My friend doesn't have this problem with Arion...
In the RT engine, you cannot clamp the output, or you'll lose the HDR.
Sub-pixel mapping in the first version of VRay was hide and, by default, ON. Clamp was exposed.
But, after the 1.46 (or 1.47) Vlado exposed this parameters.
With sub-pixel OFF, we have a better rendering, more realistic highlight, but the rendering time, sometimes (in the interior), is x5!!!
So, if you had a rendering in 3 hours, now, with sub-pixel off, you can easily have a 15-20 hours rendering (BF+LC) Crazy!
I fight every day with Sub-pixel and noise in VRay. But, with our little renderfarm, is not possible turn on Sub-pixel mapping.
But this is not enough, sometimes. If you have bright object or hight light contrast shader, you have equally some artifacts, like jagged edges.
And this is a big problem! So, I must clamp output. Sometime 4-5 is enough, sometimes not.
But this is for a producer render
If we talk about VRay-RT we have two different solution CPU and GPU. In the last version, Vlado, for solve this boring and very annoying problem,
only in the GPU version added a "filter" that "blurred" the final output.
But with strong highlight, the new filter (no option for this filter now. It's on by default and hide) this not solve the jagged edges.
My friend doesn't have this problem with Arion...
In the RT engine, you cannot clamp the output, or you'll lose the HDR.
-
FractalBuddha
- Posts: 73
- Joined: Sat Oct 22, 2011 2:26 am
The look like a photo.. very nice
Imagine reality
2 x GTX 560 | i7 | windows 7
2 x GTX 560 | i7 | windows 7
-
gabrielefx
- Posts: 1701
- Joined: Wed Sep 28, 2011 2:00 pm
Hi Ceco,
without your guide I never learnt Vray. Chaos has to thank you.
Recently Chaos and Vlado is getting nervous because we found bugs and we post them.
They don't listen their customers. I posted hundreds of Vray rt bugs
this is not the place to post vray bugs obviously.
I would like to use Octane for Max for all my renders but today I can't.
We need several tools to do everything.
Yesterdey I used Vray rt to render an interior with a lot of glass panels illuminated by hundreds of ies lights.
In Octane you can't because it doesn't have an architectural specular mat. You can't simulate transparent thin walls with glossy mats because they are fake and you lost refractions on borders.
Also the sun doesn't shine through the glass.
Regarding the ies, try to point 100 lights rotating that tiny diamond. Octane needs directional lights with target point.
Regards
without your guide I never learnt Vray. Chaos has to thank you.
Recently Chaos and Vlado is getting nervous because we found bugs and we post them.
They don't listen their customers. I posted hundreds of Vray rt bugs
this is not the place to post vray bugs obviously.
I would like to use Octane for Max for all my renders but today I can't.
We need several tools to do everything.
Yesterdey I used Vray rt to render an interior with a lot of glass panels illuminated by hundreds of ies lights.
In Octane you can't because it doesn't have an architectural specular mat. You can't simulate transparent thin walls with glossy mats because they are fake and you lost refractions on borders.
Also the sun doesn't shine through the glass.
Regarding the ies, try to point 100 lights rotating that tiny diamond. Octane needs directional lights with target point.
Regards
quad Titan Kepler 6GB + quad Titan X Pascal 12GB + quad GTX1080 8GB + dual GTX1080Ti 11GB
VRay Producer is old (2001) and strong renderer. VRay-RT is young and we would like to see all the VRay Producer tools already in the RT version =)
Same for Octane vs Octane4Max. We must wait, with patience
Same for Octane vs Octane4Max. We must wait, with patience
Did you try to use glossy material with 100% reflection and falloff in opacity?gabrielefx wrote: In Octane you can't because it doesn't have an architectural specular mat.
Regards
What do you mean?gabrielefx wrote: You can't simulate transparent thin walls with glossy mats because they are fake and you lost refractions on borders
Regards
Does it make sense?gabrielefx wrote: Regarding the ies, try to point 100 lights rotating that tiny diamond. Octane needs directional lights with target point.
Regards
It is without a target point. At least you can see the direction.
- Attachments
-