[Sidefx-houdini-list] houdini, tiffs and txmake
Andrew D Lyons
tstexture at gmail.com
Wed Dec 12 20:23:55 EST 2007
Cool - I'll try that out tomorrow...
On 12/12/2007, Rangi Sutton <rangi at kanuka.com.au> wrote:
> Andrew D Lyons wrote:
> > Well the thing is we are using the original tiff in the GL shader to
> > see the texture in the viewport, and the tx file for rendering in
> > prman.
> You can still flip the texture in the shader, flat ss =s ; float tt =
> (1-t) kinda thing.. Rather than flip the uv co-ordinates in the object.
> OGL will continue to display it the same way.
> > The tx was generated from the tiff - so they should be the same
> > - but it's inverted.
> I believe this is to do with the tiff header defining the vertical order
> of the image and some (most!) software ignoring it. Houdini writes it
> and reads it. If Houdini would wrongly ignore it and didn't use it then
> it would work better with other software. However it's part of the tiff
> header and the other software should be fixed rather than Houdini broke.
> Where are you're tiffs coming from in the first place? Out of houdini?
> If so, set that env var you mentioned, and Houdini will flip it's tiffs
> and write the fact into it's header. Houdini will subsequently read the
> flag and display the image correctly. txmake will continue to ignore the
> flag, but now that won't be a problem. Make sense?
> I'm making this up, btw.. not testing shite ;) Don't got prman here.
> > The uv's seem right, so I don't want to mess with
> > them. I haven't really looked into it much. It's a problem someone
> > else is having, but I wanted to see if it was a common one...
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Andrew D Lyons | Digital Artist | http://www.tstex.com
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