[Bf-committers] Re: [Bf-blender-cvs] CVS commit: blender/source/blender/blenkernel/intern scene.c blender/source/blender/blenloader/intern readfile.c blender/source/blender/include BIF_editview.h butspace.h blender/source/blender/makesdna DNA_camera_types.h DNA_scene_types.h blender/source/blender/render SConscript ...

[Ton Roosendaal]

Hi,

The auto-focus does not work for animations. You just added the 'delay'  
feature in it to make it "work". Results of using that are highly  
disapppointing in real testing situations. Try to use this in one of  
your more serious projects!

All of this because it's not DoF, but a zbuffer blur based on splitting  
zvalues in 2 halves, front/back, and use a two-pass filter to blur the  
picture. Its use is limited to a full understanding of zbuffer values,  
setting up correct camera clipping, a correct zmin value, and actually  
a correction zmax should be added too. With a very painful tweak of all  
settings you might get a nice looking picture, but with the "focus"  
moving around during an animation the results will look just ugly.

Even *if* it were a good working zblur system, then still the focus  
distance should just become an Ipo curve for a much more natural  
control.

I don't blame your work, but the quality of zblur itself... which is  
just a very hard to handle post effect, and hardly useful in more  
complex scenes.

All good looking 3d animations I've seen with a DoF effect don't use a  
straight single-picture zblur, but render a picture in multiple layers  
(front part, back part, maybe center part). Then these parts are  
individually blurred, with alpha, and composited again. Such an  
approach belongs in our sequencer.

-Ton-

On 24 Apr, 2005, at 11:55, Alexander Ewering wrote:

>
> On Sat, 23 Apr 2005, Ton Roosendaal wrote:
>
>>  - Didn't copy 'auto focus' yet. Use of this is very limited, and  
>> gives
>>    false expectations, nor works for rendering anims with deamons  
>> well.
>
> Urm Ton, I think this is a very serious problem, and practically  
> eliminates
> any advantage this has over the original plugin.
>
> It's the single feature that makes this usable at all.
>
> But well.
>
> | alexander ewering              instinctive mediaworks
> | ae[@]instinctive[.]de   http://www[.]instinctive[.]de
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>
------------------------------------------------------------------------ 
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Ton Roosendaal  Blender Foundation ton at blender.org  
http://www.blender.org