[Sidefx-houdini-list] Practical RAT size limits
frederic.servant at gmail.com
Wed Aug 26 19:33:51 EDT 2009
Quick update: I was finally able to generate 80k x 40k .rat maps by writting
a raw image loader derived from the HDK sample IMG_Raw and using the icp
command to convert to .rat, nothing else worked for me.
On Thu, Aug 20, 2009 at 3:52 PM, Frederic Servant <
frederic.servant at gmail.com> wrote:
> Hi Mark,
> I store my intermediate results in .rat files. I use the sequence and
> mosaic cops to assemble the images.
> Frederic Servant
> R&D Engineer
> La Maison
> On Thu, Aug 20, 2009 at 3:34 PM, Mark Elendt <mark at sidefx.com> wrote:
>> On Thursday Aug 20 at 12:42, Frederic Servant wrote:
>> > Hi list,
>> > I'm trying to assemble huge RAT maps (80000 x 40000) but it seems I hit
>> > wall if any dimension exceeds ~32000 pixels (2^15?).
>> > Does anyone have more insight of the limitations of the RAT file format
>> > / or COP processing generally in houdini, dimension-wise?
>> I was able to generate a 40000x40000 .rat file which seems to work (on
>> my 32-bit machine). In a terminal:
>> % icomposite -w 40000 -h 40000 c.rat = $HH/pic/circle.pic
>> will generate a 40Kx40K image. This appears to be correct (when I
>> access it as a texture). So, I'm guessing that you're running into
>> issues in other parts of the process.
>> Some image formats store their resolution as 16-bit integers (maximum
>> resolution of 32767). Are you storing intermediate results in
>> temporary files (i.e. .bmp files have a maximum resolution of 32K)?
>> Mark Elendt
>> Sidefx-houdini-list mailing list
>> Sidefx-houdini-list at sidefx.com
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