Search found 27 matches

by bkd
Thu Aug 24, 2017 9:30 pm
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Re: Let's check your depth buffer precision!

Thanks, Dodoid. It seems that MXE will show the same result. Wait for your Onyx to test it.)
by bkd
Tue Aug 22, 2017 4:50 am
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Re: Let's check your depth buffer precision!

rooprob wrote:Hi,I tried this out for you, for what it's worth:

Thanks, pretty interesting. Wait for someone with MXE try this but I think results will be the same as yours.
by bkd
Mon Aug 21, 2017 8:35 pm
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Re: Let's check your depth buffer precision!

You'll also find that if you move the object closer to the far clipping plane it will get a lot worse. If you expect to see a green quad, then this implies that the green quad is closer to the viewer than the grey one, but they are at the same distance. Of course, on standard OpenGL Z-buffer (Z/W d...
by bkd
Sun Aug 20, 2017 11:56 pm
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Re: Let's check your depth buffer precision!

Simply load a scene into Maya and then rotate the planes (there are two of them) - hold Alt and move your mouse while holding left button. And watch for some glitches. In perfect situation you must see only grey color on top and only green below (+ grid) but NOT that you can see on my screens. It me...
by bkd
Sun Aug 20, 2017 9:01 pm
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Re: Let's check your depth buffer precision!

So far no one post results. Something wrong with test scene? On my Maya 6.5 (IRIX 6.5.22) it definitely opens with no problems.
by bkd
Sat Aug 19, 2017 8:06 am
Forum: SGI: Computer Graphics
Topic: Let's check your depth buffer precision!
Replies: 12
Views: 629

Let's check your depth buffer precision!

Some time ago I read here (but can't find now where exactly) about rendering quality of various systems. I made simple scene in Maya 6.5 ( attached , originally on Windows XP, but IRIX Maya opens it without problems) for this purposes. I want that people here simply open this scene, rotate and exami...
by bkd
Sat May 13, 2017 9:16 pm
Forum: SGI: Computer Graphics
Topic: RGBA 48 bits with db at 1280*1024 works on V10?
Replies: 1
Views: 415

Re: RGBA 48 bits with db at 1280*1024 works on V10?

About V12: can someone explain why in maximum possible framebuffer quality 12/12/12/12 db there is ONLY 16 bit depth buffer? Why? I also think about marketing (V12 vs. IR) because there is enough memory left for at least 24 bit depth buffer.
by bkd
Sun Apr 30, 2017 11:50 pm
Forum: SGI: Computer Graphics
Topic: RGBA 48 bits with db at 1280*1024 works on V10?
Replies: 1
Views: 415

RGBA 48 bits with db at 1280*1024 works on V10?

I wonder can one select such a mode? We have on (all?) VPro 128 bits per pixel. Take 48 bits RGBA first color buffer and take second again 48 bits. The sum is 96. And we have exactly 32 bits left for Z-buffer (24 bit + stencil). But glxinfo shows only 10/10/10/2. Why? Even on IMPACT I can select 12/...
by bkd
Sat Oct 15, 2016 8:22 am
Forum: SGI: Computer Graphics
Topic: Current state of Alias Composer and Studiopaint (3D)
Replies: 10
Views: 952

Re: Current state of Alias Composer and Studiopaint (3D)

Can someone explain why SP 9.5 not using hardware brushes with V6/V10 graphics (http://download.autodesk.com/us/aliasst ... t_9.5.html)? As far as I understand V10 is not worse in almost all positions comparing to MXE? What is the real reason of this thing? Marketing?
by bkd
Fri Oct 14, 2016 8:26 pm
Forum: SGI: Hardware
Topic: [Fuel] Both SCSI buses show 15 ghost devices
Replies: 8
Views: 352

Re: [Fuel] Both SCSI buses show 15 ghost devices

Trippynet , okay I'll do a search about that. I.e. even on latest revision of Fuel L1 only monitor PSU PRM values and not control them? What about other fans in the system? And PSU fan speed totally unconrollable (even by PSU itself) and only can increase to some limit, right? Mark , you are right,...
by bkd
Fri Oct 14, 2016 11:15 am
Forum: SGI: Hardware
Topic: [Fuel] Both SCSI buses show 15 ghost devices
Replies: 8
Views: 352

Re: [Fuel] Both SCSI buses show 15 ghost devices

You were right. It was ID conflict. I changed both devices IDs to 1 and it works now. Thank you. PS: I don't want to create one more thread and want to ask you here [before my question I made a search through all forum and found varied answers] - in that our Fuel most annoying thing about sound leve...
by bkd
Tue Oct 11, 2016 8:34 pm
Forum: SGI: Hardware
Topic: [Fuel] Both SCSI buses show 15 ghost devices
Replies: 8
Views: 352

Re: [Fuel] Both SCSI buses show 15 ghost devices

Thanks for answers. We'll try it. It seems that all four (DVD-ROM, HDD and both SCSI controllers) devices have the same ID, that is - "0"? Right?
by bkd
Tue Oct 11, 2016 11:43 am
Forum: SGI: Hardware
Topic: [Fuel] Both SCSI buses show 15 ghost devices
Replies: 8
Views: 352

[Fuel] Both SCSI buses show 15 ghost devices

I think this is continue to this thread - "http://forums.nekochan.net/viewtopic.php?f=3&t=16728289". Story: my friend bought some time ago two Fuels in relatively good condition. Both are first revisions (2002). Both have equal configuration (as I can tell) but with SCSI there is somet...
by bkd
Wed Sep 21, 2016 10:35 pm
Forum: SGI: Computer Graphics
Topic: Current state of Alias Composer and Studiopaint (3D)
Replies: 10
Views: 952

Re: Current state of Alias Composer and Studiopaint (3D)

I wonder what overall precision of OpenGL pipeline (including rasterization part) implemented in hardware by SGI? In the mid-end (MGRAS, VPro) and hi-end (RE, IR). Do they implement full 32 bit floating point single precision (IEEE 754-1985) or something less (16-24 bit float)? Some time ago I tried...
by bkd
Wed Sep 21, 2016 11:02 am
Forum: SGI: Computer Graphics
Topic: Current state of Alias Composer and Studiopaint (3D)
Replies: 10
Views: 952

Re: Current state of Alias Composer and Studiopaint (3D)

foetz, GIJoe - thanks for answers! Can you please explain to me next thing. In this page "http://download.autodesk.com/us/aliasstudio/qualcharts/spaint_9.5.html" Alias wrote about hardware brushes (there are two of them - 8 and 12 bit). I assume this is quantity of bits per one color chann...

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