HELP! Cant get no DOF :(

General questions about Indigo, the scene format, rendering etc...
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kikeonline
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HELP! Cant get no DOF :(

Post by kikeonline » Wed May 21, 2008 2:56 am

Hi guys,

Let me introduce myself, I'm Kike, Architect from Nicaragua, I work with graphics desigh, interior desigh and envoirmental or green house.


I'm a noob in Indigo render , but I see a lot of you guys are pros which makes me feel that I'm with masters that can tutor me. :D


Ok well my problem is that no matter what I try I CANT GET NO DOF.

I ran the dof_test.igs scene from indigo and it works fine.

can someone send me a blend file with DOF so I can see the parameters?

Or can someone explain me with details how it works? (I did not find any tutorials on DOF)


waiting anxiously for your enlighment indigo masters :P

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PureSpider
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Post by PureSpider » Wed May 21, 2008 3:03 am

Just set your cam to a indigo cam, i don't know how that works exactly as i'm unsing C4D
Then set the F-Number to something low like F/4 or so...
Also try to experiment with the sensor width (increase it)
I hope that helps

BbB
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Post by BbB » Wed May 21, 2008 3:17 am

Hi Kike,
You sure got yourself a weird nickname there. Anyway, the thing to remember with Indigo is that it works exactly like an SLR camera does. Which means it won't give you shallow DOF in situations where a normal camera wouldn't.
As a rule, for shallow DOF (which I assume is what you want), you need one or several of these conditions:
1) Large aperture (Anything between 1 and 6)
2) Long lens. A wide angle (like 28mm, or even 50mm) won't give you much DOF. Whereas a really long lens like 120 or so will give you plenty.
3) Small-scale scene. Remember that scale is hugely important in Indigo. If you shoot a picture of a city skyline, even with an aperture of 1, you won't see blurry buildings at the back and front of your focus point. But if you shoot little shot glasses on a table, you will. Somehow you need to make sure that in your applications, you are working with the right scale units.
That's why there is generally not much DOF in Archviz images, unless you're dealing with very small details. Artificially boosting DOF in Arhviz image will make your buildings look like scale models.

So check all these elements and it should work.

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kikeonline
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Post by kikeonline » Wed May 21, 2008 4:46 am

(My nickname is short for Enrique in spanish , somebody told me that is also a slang name for jewish people, but that is not my intentiones at all)


anyeways
This is a test....

Image

I got blur in the foreground for the first time!!! :P Thanks a lot!!!

How do I control the Aperture? I'm using Blendigo 1.0.9

this are my setting for that render:

Film ISO : 100
Exposure: 1/125
F-stop: 1.4
White Bal: E
Focus Dist: 14.46
Physical Sun


I will continue to do more tests , with a smaller scale.

thaks a lot!

BbB
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Post by BbB » Wed May 21, 2008 5:02 am

Aperture is the F-Stop. 1.4 is as large as you can get, which is why you're starting to see DOF. Smaller scale will mean even more DOF

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kikeonline
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Post by kikeonline » Wed May 21, 2008 5:06 am

So in a large scale that is the best blur I can get?

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Kram1032
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Post by Kram1032 » Wed May 21, 2008 6:35 am

if you aim for DoF, that's ALWAYS the best you can get ;)
If you don't aim for it, it's the worst.

Don't forget, as mentioned above:
DoF depends on:

- distance from the camera to the object you're rendering (closer/more zoomed -> more DoF
- aperture size (or F-stop) (lower f-stop / bigger aperture -> more DoF)
- lens width (more mm -> more DoF)

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zsouthboy
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Post by zsouthboy » Wed May 21, 2008 3:25 pm

Focus Dist: 14.46
There's an indication of your problem. That's saying that your focal point is 14 meters away from the camera!

Your scene scale is 10x too large (or more, depending on your intentions).

Change the scale to 1 x 10 ^ -1 in the environment tab in blendigo.

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kikeonline
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Post by kikeonline » Thu May 22, 2008 2:46 am

in the same scene I selected everything and scale it to a lower size. and everything worked great.


zsouthboy
Can you explain me a little bit more?? so if I change the scale in enviorment tab I dont have to resize my objects?


Thanks to all my masters :D

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PureSpider
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Post by PureSpider » Thu May 22, 2008 2:50 am

Yes thats right
If you change the scale to 1 x 10 ^ -1 it's the same as if you scale your objects to 0.1 of their original size

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zsouthboy
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Post by zsouthboy » Thu May 22, 2008 2:51 am

Yes, if you choose a "scene scale" in the environment tab, you can continue to work in blender without manually scaling the scene - it will be done automatically at export time.

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kikeonline
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Post by kikeonline » Thu May 22, 2008 2:59 am

All Right!! :D


I have the knowledge, Now I need to practice.


thanks again guys. awsome and warm forum :wink:

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