Physical correct??
Physical correct??
Hi All,
See attached image/chart. When I use this chart the lighting in the scene is waaaaay to bright.
In my best knowledge I thought Indigo is a Physical correct engine but when I use physical correct setting in a cam, it does not look really cool.
See my current cam settings with those settings it renders ok (see attached c4d file)
But when I use the settings as seen on the chart it is way to bright.
For example:
F-stop: 16
Exposure duration: 1/4s
EV: 10
ISO: 100
Anybody an idea?
Or do I see things wrong on the chart?
The scene is in cm....
See attached image/chart. When I use this chart the lighting in the scene is waaaaay to bright.
In my best knowledge I thought Indigo is a Physical correct engine but when I use physical correct setting in a cam, it does not look really cool.
See my current cam settings with those settings it renders ok (see attached c4d file)
But when I use the settings as seen on the chart it is way to bright.
For example:
F-stop: 16
Exposure duration: 1/4s
EV: 10
ISO: 100
Anybody an idea?
Or do I see things wrong on the chart?
The scene is in cm....
- Attachments
-
- sunlight-test.zip
- (167.24 KiB) Downloaded 233 times
Cinema4D R13 Studio + VrayforC4D + UVLayout Pro + 3DCoat + MOI3D
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
Re: Physical correct??
Attached another example.
It looks like the EV setting in Indigo is the opposite as seen on this chart..
When I have a bright sunny day and I set the EV to 16... you understand it will blow out the scene complete.
On the chart you can see that a night shot (moon) has to have an EV of -2 or -3 !!!!
Peace,
Rich_Art.
It looks like the EV setting in Indigo is the opposite as seen on this chart..
When I have a bright sunny day and I set the EV to 16... you understand it will blow out the scene complete.
On the chart you can see that a night shot (moon) has to have an EV of -2 or -3 !!!!
Peace,
Rich_Art.
Cinema4D R13 Studio + VrayforC4D + UVLayout Pro + 3DCoat + MOI3D
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
Re: Physical correct??
For EV the technical manual references it like that:
http://en.wikipedia.org/wiki/Exposure_value
But anyway, I hope I didn't mixed up stuff here ^^
It is a pure Tonemapping value, not interacting with fstop and shutter speed as in real world cameras:tonemapping :: camera :: ev_adjust
ev_adjust is exposure-value adjustment; increasing this value by 1 will effectively double the 'sensor output'.
http://en.wikipedia.org/wiki/Exposure_value
But anyway, I hope I didn't mixed up stuff here ^^
polygonmanufaktur.de
Re: Physical correct??
Hi Rich_Art,
I think you might be misunderstanding the charts/EV adjust.
The settings you used(fstop 16, exposure 1/100) correspond to an EV of 15-16, which is, as you can see on the second chart you posted a "Typical scene in full or slightly hazy sunlight".
The EV in the camera tonemapping is for adjusting the EV (therefore the name, "EV adjust"). For recreating an EV from the charts you should leave it on 0.0.
You can also verify (via eyeballing) that Indigo's brightness is more or less correct if you try out the sunny 16 rule: http://en.wikipedia.org/wiki/Sunny_16_rule
I think you might be misunderstanding the charts/EV adjust.
The settings you used(fstop 16, exposure 1/100) correspond to an EV of 15-16, which is, as you can see on the second chart you posted a "Typical scene in full or slightly hazy sunlight".
The EV in the camera tonemapping is for adjusting the EV (therefore the name, "EV adjust"). For recreating an EV from the charts you should leave it on 0.0.
You can also verify (via eyeballing) that Indigo's brightness is more or less correct if you try out the sunny 16 rule: http://en.wikipedia.org/wiki/Sunny_16_rule
Re: Physical correct??
Thanks guy's..
I'm using the sunny 16 rule..
I thought the EV in Indigo is the same EV as seen on those charts but apparently that is not the case.
Anyway thanks for the clarification..
Peace,
Rich_Art.
I'm using the sunny 16 rule..
I thought the EV in Indigo is the same EV as seen on those charts but apparently that is not the case.
Anyway thanks for the clarification..
Peace,
Rich_Art.
Cinema4D R13 Studio + VrayforC4D + UVLayout Pro + 3DCoat + MOI3D
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
- pixie
- Posts: 2332
- Joined: Sat Dec 29, 2007 4:54 am
- Location: Away from paradise
- 3D Software: Cinema 4D
- Contact:
Re: Physical correct??
I do use this rule without any problem, 16 is on the f-stop (aperture) 100 is on time (since I have 100 on iso) and ev is set to 0 so it doesn't it interfere. Work always as a charm.Rich_Art wrote:Thanks guy's..
I'm using the sunny 16 rule..
I thought the EV in Indigo is the same EV as seen on those charts but apparently that is not the case.
Anyway thanks for the clarification..
Peace,
Rich_Art.
Code: Select all
The basic rule is, "On a sunny day set aperture to f/16 and shutter speed to the [reciprocal of the] ISO film speed [or ISO setting] for a subject in direct sunlight."
The EV on indigo for C4D is the same as on the first table, you have the aperture in the row on top and have the time in the cells, which gives you the EV on the collumn on the left.
Re: Physical correct??
Hi - the test scene you uploaded renders quite alright
this is what I saw straight from your file -
this is what I saw straight from your file -
-----------------------------------
OS X 10.8 Mac Pro(5.1) 2 x 2.93GHz 6 core Xeon, 14GB Ram, ATI Radeon HD 5870 1GB, Wacom PL 2200, Cinema 4d r12/r13, Maxwell 2, Thea Render & Indigo 3
http://www.pulsegroup.com
OS X 10.8 Mac Pro(5.1) 2 x 2.93GHz 6 core Xeon, 14GB Ram, ATI Radeon HD 5870 1GB, Wacom PL 2200, Cinema 4d r12/r13, Maxwell 2, Thea Render & Indigo 3
http://www.pulsegroup.com
Re: Physical correct??
ignore me - I havn't has my coffee yet... (RTFM)
-----------------------------------
OS X 10.8 Mac Pro(5.1) 2 x 2.93GHz 6 core Xeon, 14GB Ram, ATI Radeon HD 5870 1GB, Wacom PL 2200, Cinema 4d r12/r13, Maxwell 2, Thea Render & Indigo 3
http://www.pulsegroup.com
OS X 10.8 Mac Pro(5.1) 2 x 2.93GHz 6 core Xeon, 14GB Ram, ATI Radeon HD 5870 1GB, Wacom PL 2200, Cinema 4d r12/r13, Maxwell 2, Thea Render & Indigo 3
http://www.pulsegroup.com
Re: Physical correct??
Yes I see but have you test it??pixie wrote: The EV on indigo for C4D is the same as on the first table, you have the aperture in the row on top and have the time in the cells, which gives you the EV on the collumn on the left.
If I look at the chart and pick the following F-stop and time,
F-stop: 16
shutter speed: 1/125
Then the EV should be set to 15, that is not correct of course because the scene will be way to bright..
As fused stated,
So i'll leave it as it is and only make minor adjustments...The EV in the camera tonemapping is for adjusting the EV (therefore the name, "EV adjust"). For recreating an EV from the charts you should leave it on 0.0.
better play with Fstop, iso and shutter speed..
Peace,
Rich_Art.
Cinema4D R13 Studio + VrayforC4D + UVLayout Pro + 3DCoat + MOI3D
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
- pixie
- Posts: 2332
- Joined: Sat Dec 29, 2007 4:54 am
- Location: Away from paradise
- 3D Software: Cinema 4D
- Contact:
Re: Physical correct??
Well, now that I look more into it I've got to say that somehow your chart is wrong or at least meaningless, if you could post it in context, one might try understand where it came from. Pick any manual camera you'll see it will have the same problems you're getting with indigo...
Re: Physical correct??
Yeah that is what I thought as well.
The chart is from wiki.
http://en.wikipedia.org/wiki/Exposure_value
Peace,
Rich_Art.
The chart is from wiki.
http://en.wikipedia.org/wiki/Exposure_value
Peace,
Rich_Art.
Cinema4D R13 Studio + VrayforC4D + UVLayout Pro + 3DCoat + MOI3D
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
[FONT=Book Antiqua]Neem ook gerust eens een kijkje in mijn galerij en op mijn Vimeo page
Who is online
Users browsing this forum: No registered users and 34 guests