[Bf-committers] Cycles and Dynamic Paint - Problem with render but not preview
blenderdev at mikes.id.au
Sun Nov 13 03:39:47 CET 2011
Hi Douglas, et al
On 11/11/11 16:56, Knapp wrote:
> On Fri, Nov 11, 2011 at 1:50 AM, Mike S<blenderdev at mikes.id.au> wrote:
>> Hi all,
>> Just playing with the latest build # r41746. (built scons, gcc4.6.1 OSX
>> I was trying to get dynamic paint output to render on cycles. It does to
>> some degree ( using the vertex colour option for the canvas on a
>> subdivided plane) I can see the correct result in the preview window
>> but, if I render I only get the brush object rendered correctly and the
>> canvas is black .
>> See image : http://www.pasteall.org/pic/20441
>> The preview I can refresh easily after scrubbing the animation by simply
>> changing the preview window from Rendered to another mode and back again
>> ( this would be good do automatically when the animation is stopped or
>> static for a second or so rather than have to do it manually - same
>> issue with fluid sims with cycles )
>> However in the render window the canvas is always black. Not sure why
>> this should be given the preview rendering should be the same engine as
>> the final render? Is this a bug or is dynamic paint in this mode
>> (vertex) not supposed to work with Cycles?
> I had a problem a lot like this with both particles. Does it not work
> yet with them?
It does work with Object or Group particle type as long as they have
been assigned a Cycles shader type. Halo/Hair/Strand shaders etc are
still to be implemented I believe.
> I also had that problem when using image texture and then clicking the
> first button with the little folded picture so that you can choose
> preloaded images. It does not work but if you cick the file loading
> button on the same line and load the pic it works. Maybe this info
> will help? I have not filed a bug report on this yet, was planning to
> confirm on a newer version first but if you do confirm I would like to
> know so I can file the report, on the other hand I bet it is already
> filed or known by now.
Yes I noticed that, I think there was a mention of something like this
in the commit messages a while ago.
You may have to set the Vector (mapping) to "Generated" for it to work
(on a plane) or UV (on an unwrapped object) otherwise the default
"Default" Vector setting is mucked up and you get a smeared out colour
based upon the image. I *thought* it used to work immediately with a
plane in the past although I could be mistaken.
My uncertainty is with the Preview vs. Render window visibility of
textures being different. I suspect it may be something to do with the
compositing side of things which is still to be integrated with Cycles
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