Hi Gene, Hi Thomas,
sorry for the delay, been offlist.
Will give both the physical sky environment shader settings
and the *.tif 16bit>PhotoshopCS2 problem another look
tomorrow.
Cheers
tim
Thomas Helzle wrote:
I hate this behavior from photoshop with all my heart but haven't found a
cure for it.
My current (annoying) workaround is, to render to .sgi 16 bit instead and
convert that to tif with photoshop. This way the alpha isn't treated as
"transparent" but shows up as a normal alpha channel.
If anyone knows how to stop photoshop from interpreting the alpha in tifs as
transparency, I'm all ears :-)
For the other problem - you should be able to overwrite the background alpha
with a fixed setting in the rendertree of your pass' environment.
And set Alpha Clipping in the Rendersettings-Framebuffer to no clipping.
This way you gain some control back over the alpha from MRs weird defaults.
I do that all the time.
Cheers,
Thomas
On Sun, May 4, 2008 at 6:12 PM, Tim Leydecker <baueroink(at)gmx.de> wrote:
Hi Gene,
thanks for looking into this, that´s exactly what I´m getting
with the physical sky environment shader, a semitransparent
result in the RGB channels when opening a 16bit *.tif in Photoshop CS2.
As you did, adding a full black layer underneath will result in
the image as you´d get it when output through XSI in another
format, like 8bit *.pic.
I´m not sure if this is a *.tif 16bit problem, in the way
the channels are interpreted on Photoshop CS2 import and
also why the physical sky environment would be interpreted
(or stored?) semitransparent in the first place by mR?
Cheers
tim
Gene Crucean wrote:
I'm a little confused by how you worded this Tim. Does this file
demonstrate
your problem? http://www.genecrucean.com/misc/TimL.rar
Look at the background in the channels with the background layer
visible,
then toggle off the background layer then look at them again.
-Gene
On Fri, May 2, 2008 at 4:42 AM, Tim Leydecker <baueroink(at)gmx.de> wrote:
XSI 6.5 32bit, XP64.
Hi guys,
using a mR physical sky as the environment,
when I output to RGBA *.tif 16bit and open
the file in Photoshop, the alpha channel is
missing and I get semitransparent RGB channels
in the regions the environment shows through.
Now this seems like two problems, one with the
*.tif 16bit RGBA interpreted wrong by Photoshop
(like the initial Photoshop 7 bug with *.tga)
but also with mR_settings the environment should
either have a solid white or black Alpha, right?
(I´d prefer a toggle, so one can comp as desired).
Anyone can repro this or provide a workaround?
I can add a solid black layer beneath my RGB/color
in Photoshop to get solid color channel but still
don´t know wether I might simply have set something
wrong within XSI, like clipping or premult settings?
Cheers
tim
---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in
body:
unsubscribe xsi
---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi
---
Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
unsubscribe xsi
