MINI-TUT:How to use the new 2.3 v5 hotpixel tool effectively

Forums: MINI-TUT:How to use the new 2.3 v5 hotpixel tool effectively
Post, discuss and share handy resources like textures, models and HDRI maps in this forum.
Forum rules
Please do not post any material that is copyrighted or restricted from public use in any way. OTOY NZ LTD and it's forum members are not liable for any copyright infringements on material in this forum. Please contact us if this is the case and we will remove the material in question.

MINI-TUT:How to use the new 2.3 v5 hotpixel tool effectively

Postby radiance » Fri Oct 01, 2010 5:23 pm

radiance Fri Oct 01, 2010 5:23 pm
Hi guys,

The beta 2.3 v5 which was just released about an hour ago has a very handy new slider in the camera tonemapper's input pins/parameters,
which you can use to remove the fireflies or hotpixels as some call them very effectively, given the following advice:

1. Let your render finish, eg don't wait for all the fireflies to converge for hours, just do your ~20 minute unbiased (pathtracing, maxdepth = 1024) final render and wait until it's clean in terms of the amount of noise. (eg 3000 samples / pixel or more)

2. Pause the engine and open the camera tonemapper, and slide the firefly reduction slider lower until you're happy with the amount. If you have a final quality in terms of samples/px, eg 3000+), you should get a nice result with minimal smoothing if you slide it all the way down to 0, so just find the right level for your render. There are no real defaults as it depends on various things, your scene, light intensity etc...

3. save and post in the forums, or send to your customers ;)

Note that the more samples per pixel you have, the less smoothing you get when using a high amount of firefly reduction.

Attached an example of a final render, paused and then 2 shots of it taken, first one without the reduction (eg the slider is at 1.0 / right), the second with the reduction at nearly 0 (0.01).
The only issue remaining is unexplored caustics as you can see below the right front red chair, but the v6 will solve this with the new xxx algorithm which is nearly finished.

flies.jpg
without any firefly reduction


noflies.jpg
with reduction at 0.1


Yours,
Radiance
Win 7 x64 & ubuntu | 2x GTX480 | Quad 2.66GHz | 8GB
User avatar
radiance
OctaneRender Team
OctaneRender Team
 
Posts: 7633
Joined: Wed Oct 21, 2009 2:33 pm

Re: MINI-TUT:How to use the new 2.3 v5 hotpixel tool effectively

Postby GeoPappas » Fri Oct 01, 2010 6:36 pm

GeoPappas Fri Oct 01, 2010 6:36 pm
Looks like a great feature.

But since the slider is called "fireflyreduction", I would have thought that increasing the slider (from 0 to 1) would have increased the reduction.
GeoPappas
Licensed Customer
Licensed Customer
 
Posts: 429
Joined: Fri Mar 26, 2010 5:31 pm

Re: MINI-TUT:How to use the new 2.3 v5 hotpixel tool effectively

Postby DayVids » Sat Oct 02, 2010 8:46 am

DayVids Sat Oct 02, 2010 8:46 am
same here, you may want to reverse this slider or change it's name to more accurately reflect the way the control is used.
CPU - i7-950 3.06 Ghz, 24GB Ram, Win7 x64, 2 display monitors, GeForce GTX 580 3GB Classified. I'm glad to say I LOVE OCTANE!
DayVids
Licensed Customer
Licensed Customer
 
Posts: 350
Joined: Tue May 11, 2010 2:35 am

MINI TUT How to use the new 2 3 v5 hotpixel tool effectively

Postby Joshuaowew » Sat Jun 20, 2015 10:12 am

Joshuaowew Sat Jun 20, 2015 10:12 am
re-reading over the tut, does it save the new texture into something, or does it just make it there and then?
Интересное видео онлайн Интеренет видео онлайн!...
User avatar
Joshuaowew
 
Posts: 6
Joined: Sat Jun 13, 2015 12:20 pm

Re: MINI TUT How to use the new 2 3 v5 hotpixel tool effectively

Postby larsmidnatt » Mon Aug 10, 2015 6:54 pm

larsmidnatt Mon Aug 10, 2015 6:54 pm
Joshuaowew wrote:re-reading over the tut, does it save the new texture into something, or does it just make it there and then?


typically you would save this new image. It does not change the source assets. if you want you could even disable the hotpixel tool and save a version that does not have this feature enabled. The hotpixel tool is non-destructive and can be turned on and off as you please.
Win10 x64 i7 4770K 32GB
1070 8GB + 1060 3GB
DS 4.10 OcDS Latest
User avatar
larsmidnatt
Licensed Customer
Licensed Customer
 
Posts: 481
Joined: Tue Sep 25, 2012 12:28 pm

Return to Resources and Sharing


Who is online

Users browsing this forum: No registered users and 2 guests

Mon Dec 18, 2017 8:19 pm [ UTC ]