this setting is ignored if rendered to EXR or other float formats
On Sat, Jan 26, 2013 at 11:37 AM, Stefan Andersson <[email protected]>wrote: > Well I know *that* :) my question was more about if Softimage would clip > the values or not when we use Float/Half Float. Maybe it's wasn't all that > clear (looking back at how I wrote the question). > > Maybe if I put it this way > > Will the "Color Channel Clipping" be disabled if we use EXR (float or half > float)? > Or do we need to manually set it to "no clipping"? > > regards > stefan andersson > > > > > On Sat, Jan 26, 2013 at 5:02 PM, Leonard Koch <[email protected]>wrote: > >> EXR Half Float works exactly the same way as Full Float. >> The only difference will be, that you won't have as many possible steps >> in between the very bright and the very dark if I'm not mistaken. >> Half Float or also known as Half Precision = 16 bit >> Full Float or also known as a Single = 32 bit >> >> It's a bit of a misnomer really, especially "Half Precision", since 16 >> bits has 2^16 steps of precision and 32 bits has 2^32 steps of precision. >> 16 bits isn't half as precise but instead 2^16 or 65536 times less >> precise. >> >> Half really only refers to the filesize in this case, which will indeed >> be always a little more than half of a full float file. >> >> In my experience, half float is usually totally fine. >> >> >> On Sat, Jan 26, 2013 at 4:39 PM, Stefan Andersson <[email protected]>wrote: >> >>> As I'm again forced into the wonderfu%$##@!l world of mental ray. I was >>> just wondering if about the "Color Channel Clipping" option in the render >>> settings. The Docs says >>> >>> *"The Color clipping option defines how colors are clipped to a 0 to 1 >>> range if they are not being written at floating-point precision"* >>> >>> Well, so if *I am* writing out EXR Half float it doesn't do the >>> clipping? or does it? >>> >>> regards >>> stefan >>> >>> >>> -- >>> *Stefan Andersson | Digital Janitor* >>> blog <http://sanders3d.wordpress.com> | >>> showreel<http://vimeo.com/sanders3d>| >>> twitter <http://twitter.com/sanders3d> | >>> LinkedIn<http://www.linkedin.com/in/sanders3d>| cell: >>> +46-73-6268850 | skype:sanders3d >>> >>> >>> >> > > > -- > *Stefan Andersson | Digital Janitor* > blog <http://sanders3d.wordpress.com> | showreel<http://vimeo.com/sanders3d>| > twitter <http://twitter.com/sanders3d> | > LinkedIn<http://www.linkedin.com/in/sanders3d>| cell: > +46-73-6268850 | skype:sanders3d > > > -- --------------------------------------- Vladimir Jankijevic Technical Direction Elefant Studios AG Lessingstrasse 15 CH-8002 Zürich +41 44 500 48 20 www.elefantstudios.ch ---------------------------------------
