even though the mantra render may have been specified to be 16 bit, maybe there
is a channel or 2 in the header that is 32? I've seen some strange file size
issues and after checking with exrheader discovered that the Z was in 32 bit.
Even nuke's autocrop wouldn't shrink a file as much as Michael's example
shrunk, but nuke's forcing all channels to 16 bit could.
jrab
On May 7, 2013, at 7:27 AM, Lewis Saunders <lewis.saund...@gmail.com> wrote:
> Michael Garrett wrote:
>> I just checked in with the cg supe, and I also had
>> a look in exrheader - they're definitely regular zip1
>> scanlines, not within tiles either.
>
> Weird! I just made a big EXR and I don't see any difference rendering
> it out of Nuke. I've pasted below the results of exrheader straight
> out of Mantra and via Nuke, both files 122Mb.
>
> I avoid multilayer EXRs because they are so slow, but the few times I
> see them (mostly when a TD saves a frame from Houdini's image viewer)
> I don't recall ever seeing this happen... Mantra does add some
> metadata that doesn't pass through Nuke by default, but not THAT much
> :)
>
> /tmp/m.exr:
> file format version: 2, flags 0x0
> capDate (type string): "2013:05:07 15:09:02"
> channels (type chlist):
> A, 16-bit floating-point, sampling 1 1
> B, 16-bit floating-point, sampling 1 1
> G, 16-bit floating-point, sampling 1 1
> N.x, 16-bit floating-point, sampling 1 1
> N.y, 16-bit floating-point, sampling 1 1
> N.z, 16-bit floating-point, sampling 1 1
> P.x, 16-bit floating-point, sampling 1 1
> P.y, 16-bit floating-point, sampling 1 1
> P.z, 16-bit floating-point, sampling 1 1
> Prim_Id, 16-bit floating-point, sampling 1 1
> R, 16-bit floating-point, sampling 1 1
> Render_Time, 16-bit floating-point, sampling 1 1
> Z, 16-bit floating-point, sampling 1 1
> direct_noshadow.b, 16-bit floating-point, sampling 1 1
> direct_noshadow.g, 16-bit floating-point, sampling 1 1
> direct_noshadow.r, 16-bit floating-point, sampling 1 1
> indirect_diffuse.b, 16-bit floating-point, sampling 1 1
> indirect_diffuse.g, 16-bit floating-point, sampling 1 1
> indirect_diffuse.r, 16-bit floating-point, sampling 1 1
> indirect_noshadow.b, 16-bit floating-point, sampling 1 1
> indirect_noshadow.g, 16-bit floating-point, sampling 1 1
> indirect_noshadow.r, 16-bit floating-point, sampling 1 1
> indirect_reflect.b, 16-bit floating-point, sampling 1 1
> indirect_reflect.g, 16-bit floating-point, sampling 1 1
> indirect_reflect.r, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.b, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.g, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.r, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.b, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.g, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.r, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.b, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.g, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.r, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.b, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.g, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.r, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.b, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.g, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.r, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.b, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.g, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.r, 16-bit floating-point, sampling 1 1
> sss_multi.b, 16-bit floating-point, sampling 1 1
> sss_multi.g, 16-bit floating-point, sampling 1 1
> sss_multi.r, 16-bit floating-point, sampling 1 1
> sss_single.b, 16-bit floating-point, sampling 1 1
> sss_single.g, 16-bit floating-point, sampling 1 1
> sss_single.r, 16-bit floating-point, sampling 1 1
> comment (type string): "none"
> comments (type string): "none"
> compression (type compression): zip, individual scanlines
> dataWindow (type box2i): (0 0) - (2879 1619)
> displayWindow (type box2i): (0 0) - (2879 1619)
> lineOrder (type lineOrder): increasing y
> order (type string): "C { r g b } A obj_envlight1_direct_emission { r
> g b } obj_lgt_side_direct_emission { r g b } Render_Time
> indirect_noshadow { r g b } direct_noshadow { r g b } sss_multi { r g
> b } sss_single { r g b } indirect_reflect { r g b } indirect_diffuse {
> r g b } obj_envlight1_direct_reflect { r g b }
> obj_lgt_side_direct_reflect { r g b } obj_envlight1_direct_diffuse { r
> g b } obj_lgt_side_direct_diffuse { r g b } N { x y z } Pz P { x y z }
> Prim_Id"
> pixelAspectRatio (type float): 1
> screenWindowCenter (type v2f): (0 0)
> screenWindowWidth (type float): 1
> worldToCamera (type m44f):
> (1 0 -0 0
> 0 6.12323e-17 -1 0
> -0 -1 -6.12323e-17 0
> 3.51444e-16 8.29448e-15 61.6154 1)
> worldToNDC (type m44f):
> (2.9475 0 0 0
> 0 3.20857e-16 -0.000100001 1
> 0 -5.24 -6.12329e-21 6.12323e-17
> 1.03588e-15 4.34631e-14 0.0061516 -61.6154)
>
>
>
> /tmp/t.exr:
> file format version: 2, flags 0x0
> channels (type chlist):
> A, 16-bit floating-point, sampling 1 1
> B, 16-bit floating-point, sampling 1 1
> G, 16-bit floating-point, sampling 1 1
> N.x, 16-bit floating-point, sampling 1 1
> N.y, 16-bit floating-point, sampling 1 1
> N.z, 16-bit floating-point, sampling 1 1
> P.x, 16-bit floating-point, sampling 1 1
> P.y, 16-bit floating-point, sampling 1 1
> P.z, 16-bit floating-point, sampling 1 1
> R, 16-bit floating-point, sampling 1 1
> depth.Z, 16-bit floating-point, sampling 1 1
> direct_noshadow.blue, 16-bit floating-point, sampling 1 1
> direct_noshadow.green, 16-bit floating-point, sampling 1 1
> direct_noshadow.red, 16-bit floating-point, sampling 1 1
> indirect_diffuse.blue, 16-bit floating-point, sampling 1 1
> indirect_diffuse.green, 16-bit floating-point, sampling 1 1
> indirect_diffuse.red, 16-bit floating-point, sampling 1 1
> indirect_noshadow.blue, 16-bit floating-point, sampling 1 1
> indirect_noshadow.green, 16-bit floating-point, sampling 1 1
> indirect_noshadow.red, 16-bit floating-point, sampling 1 1
> indirect_reflect.blue, 16-bit floating-point, sampling 1 1
> indirect_reflect.green, 16-bit floating-point, sampling 1 1
> indirect_reflect.red, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.bl, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.gr, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_diffuse.re, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.b, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.g, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_emission.r, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.bl, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.gr, 16-bit floating-point, sampling 1 1
> obj_envlight1_direct_reflect.re, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.blu, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.gre, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_diffuse.red, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.bl, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.gr, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_emission.re, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.blu, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.gre, 16-bit floating-point, sampling 1 1
> obj_lgt_side_direct_reflect.red, 16-bit floating-point, sampling 1 1
> other.Prim_Id, 16-bit floating-point, sampling 1 1
> other.Render_Time, 16-bit floating-point, sampling 1 1
> sss_multi.blue, 16-bit floating-point, sampling 1 1
> sss_multi.green, 16-bit floating-point, sampling 1 1
> sss_multi.red, 16-bit floating-point, sampling 1 1
> sss_single.blue, 16-bit floating-point, sampling 1 1
> sss_single.green, 16-bit floating-point, sampling 1 1
> sss_single.red, 16-bit floating-point, sampling 1 1
> compression (type compression): zip, individual scanlines
> dataWindow (type box2i): (0 0) - (2879 1619)
> displayWindow (type box2i): (0 0) - (2879 1619)
> lineOrder (type lineOrder): increasing y
> nuke/node_hash (type string): "6409c2b50e98424a"
> pixelAspectRatio (type float): 1
> screenWindowCenter (type v2f): (0 0)
> screenWindowWidth (type float): 1
>
>
> --
> Lewis Saunders
> Wrote an EXR reader this one time
> London
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