[Bf-committers] Map Camera Coordinates to UV layer patch
Christopher Cherrett
stuff at trackingsolutions.ca
Tue Nov 17 03:54:26 CET 2009
Can you elaborate on the setup just a bit?
The end goal would be to use the uv projection modifier to project a
matte painting onto a mesh and use additional projection modifiers to
project over the stretched areas of the mesh.
So ideally if you could project the original image onto the mesh and
then paint out the stretched areas with the alpha erase brush exposing
the other projected image.
Sound possible?
-------- Original Message --------
Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
From: Campbell Barton <ideasman42 at gmail.com>
To: bf-blender developers <bf-committers at blender.org>
Date: 11/16/09 16:55
> This should work in 2.4x
> - you can paint alpha add/sub
> - the UV map used is from the 'final' derived mesh, so any modifiers
> will be applied
>
> Probably its a bit of a pain to setup, but fairly sure its supported
>
> On Mon, Nov 16, 2009 at 10:12 PM, Christopher Cherrett
> <stuff at trackingsolutions.ca> wrote:
>
>> What would be nice is if you could paint alpha with projection painting
>> onto a uv modifier. So you could just paint in the alpha of stretched
>> uvs in realtime in 3d view.
>>
>> I am not even sure if this is possible, but would be extremely powerful.
>>
>> Thanks!
>>
>> -------- Original Message --------
>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>> From: Roger Wickes <rogerwickes at yahoo.com>
>> To: bf-blender developers <bf-committers at blender.org>
>> Date: 11/14/09 17:51
>>
>>> http://wiki.blender.org/index.php/Doc:Manual/Textures/UV/Painting_the_Texture
>>> and the sub-page, Projection paint.
>>>
>>> ----------------
>>> Sent by Roger Wickes for intended recipient. If you are not the intended recipient, please delete this message and contact Mr. Wickes immediately.
>>>
>>>
>>>
>>>
>>> ________________________________
>>> From: Christopher Cherrett <stuff at trackingsolutions.ca>
>>> To: bf-blender developers <bf-committers at blender.org>
>>> Sent: Sat, November 14, 2009 5:38:04 PM
>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>
>>> I am all for simple. But I am not sure I follow. Can you demonstrate? :)
>>>
>>> -------- Original Message --------
>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>> From: Roger Wickes <rogerwickes at yahoo.com>
>>> To: bf-blender developers <bf-committers at blender.org>
>>> Date: 11/14/09 15:19
>>>
>>>
>>>> off the top of my head, simply texture paint the stretched areas
>>>> with the remove alpha brush. That will make the stretched tex
>>>> transparent, and allow the second to show through.
>>>>
>>>> but surely it could not be that simple :)
>>>>
>>>> ----------------
>>>> Sent by Roger Wickes for intended recipient. If you are not the intended recipient, please delete this message and contact Mr. Wickes immediately.
>>>>
>>>>
>>>>
>>>>
>>>> ________________________________
>>>> From: Christopher Cherrett <stuff at trackingsolutions.ca>
>>>> To: bf-blender developers <bf-committers at blender.org>
>>>> Sent: Sat, November 14, 2009 4:01:55 PM
>>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>>
>>>> In maya you can camera project and then any areas that have a stretched
>>>> texture you can project with another camera to patch in the areas with
>>>> blender alpha masks around the edges. I have tried and tried to get
>>>> blender to do the same thing with no success. I bought the gnomon Camper
>>>> Projection Techniques DVD:
>>>>
>>>> http://www.thegnomonworkshop.com/store/product/81/Camera-Projection-Techniques-in-Maya
>>>>
>>>> In that video he projected the matte painting onto the rocks and then
>>>> projected from other angles onto the stretched rock with rock texture
>>>> and was able to control the blend of the new camera onto the old.
>>>>
>>>> That sure would be nice to do in blender but as of this point the best I
>>>> can find is to project and bake to custom uvs so I can paint over the
>>>> UVs later.
>>>>
>>>> Can you think of a way to make this work the way maya does? or better?! :)
>>>>
>>>> -------- Original Message --------
>>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>> From: Roger Wickes <rogerwickes at yahoo.com>
>>>> To: bf-blender developers <bf-committers at blender.org>
>>>> Date: 11/14/09 11:27
>>>>
>>>>
>>>>
>>>>> i don't know. I do know that he was blown away by what Blender could do.
>>>>> Evidently he was looking for a very small camera truck/pan/raise action with
>>>>> something on that podium, and I was able to show him how he could get
>>>>> almost a total drive-by. I never got any paid consulting work from him,
>>>>> after his promise to "stay in touch", so I don't know where he went from there.
>>>>>
>>>>> If anyone recognizes the altar from a scene in a flick, I'd love to know...
>>>>> they were fully Maya ingrained, probably a Maya guy showed him how to do
>>>>> the same in Maya, and the status quo won out rather than switch.
>>>>>
>>>>> ----------------
>>>>> Sent by Roger Wickes for intended recipient. If you are not the intended recipient, please delete this message and contact Mr. Wickes immediately.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ________________________________
>>>>> From: Sean Olson <shatter98 at hotmail.com>
>>>>> To: bf-committers at blender.org
>>>>> Sent: Fri, November 13, 2009 6:48:12 PM
>>>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>>>
>>>>>
>>>>> Did he switch?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> Date: Fri, 13 Nov 2009 11:00:49 -0800
>>>>>> From: rogerwickes at yahoo.com
>>>>>> To: bf-committers at blender.org
>>>>>> Subject: Re: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>>>>
>>>>>> I did a tutorial on all of this last year for a hollywood guy who said
>>>>>> he would switch to Blender if I could convince him it was as good
>>>>>> as Maya. So I did.
>>>>>>
>>>>>> http://wiki.blender.org/index.php/Doc:Tutorials/Textures/UV/Camera_Mapping
>>>>>>
>>>>>> If there are improvements that could be made to the tutorial,
>>>>>> please do so. I would like it to be a catalog of the different
>>>>>> workflows available. Thanks.
>>>>>>
>>>>>>
>>>>>> --PapaSmurf----------------
>>>>>> Sent by Roger Wickes for intended recipient. If you are not the intended recipient, please delete this message and contact Mr. Wickes immediately.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ________________________________
>>>>>> From: Roland Hess <rolandh at reed-witting.com>
>>>>>> To: bf-committers at blender.org
>>>>>> Sent: Fri, November 13, 2009 1:31:08 PM
>>>>>> Subject: [Bf-committers] Map Camera Coordinates to UV layer patch
>>>>>>
>>>>>> It's the hoops and the workflow that bug me. When doing camera mapping,
>>>>>> I find it much easier to just build my initial forms, drop into camera
>>>>>> view with a background image, then align everything right there. Done.
>>>>>> If I could bake that camera view directly into UV coords, then my job is
>>>>>> done, and with a familiar, easily tweakable result.
>>>>>>
>>>>>> Brecht made the comment in the patch tracker that this is really UV
>>>>>> wrapping functionality, and should be included as an unwrap option.
>>>>>> After going through the code for the various unwrap methods, I'm
>>>>>> thinking that the best approach would be this:
>>>>>>
>>>>>> Have "Unwrap from View" simply do this correctly when the view is a
>>>>>> camera view. It's what you would expect anyway, but the unwrap code
>>>>>> doesn't really deliver. There's even a note in the source about how
>>>>>> "scaling gets weird" when you do it from camera view. I'd propose that I
>>>>>> just fix that "weirdness" so that when you "Unwrap from View" in a
>>>>>> camera view, you get what you should have gotten all along: a direct
>>>>>> translation of the 2D representation of the mesh in the camera view in
>>>>>> the UV Editor.
>>>>>>
>>>>>> With that fixed, there is no need for sticky coordinates and they can
>>>>>> just go away.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>> The main issue I have with UV Projection modifier is that in order to
>>>>>>> have it bake to a uv layout that you can paint over you have to jump
>>>>>>> through some crazy hoops. If you apply the modifier it projects to view
>>>>>>> which is useless if you would like to paint the backside of the object.
>>>>>>>
>>>>>>> Briggs walked me through a very complex setup about 6 months ago to bake
>>>>>>> to a custom defined uv layout that I had made. That was good but after
>>>>>>> leaving it for a few months there is no way I could duplicate it. I did
>>>>>>> not understand the reasoning behind why it was so hard to do but Briggs
>>>>>>> described it as two sepearte systems not communicating well.
>>>>>>>
>>>>>>> Ideally you could bake what is projected to a UV layout.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> --
>>>>>>
>>>>>> Roland Hess
>>>>>> harkyman
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>>
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>>>>>>
>>>>>>
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