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Posted
on December 04, 2001 by Thomas
McGuire
Now
select the OpenGL
tab.
Control
Full-Scene Anti-Aliasing. Kyro
1/2 Graphics cards support FSAA using the OGSS (Ordered
Grid Super Sampling) implementation.
This option allows you to select the FSAA level, if any, to
use in Direct3D Games/Applications. Regardless of the option
selected, the horizontal resolution cannot exceed
2048 pixels, i.e. FSAA will be disabled at
resolutions beyond 1280 x 1024. Options available are as
follows;
Force 4x (2x2)
Anti-aliasing. With this
option Ticked the
Horizontal & Vertical resolutions are both up-sampled by
a factor of 2, then down-sampled by averaging the colours of
a 2x2 pixel block to form 1 pixel across the entire image.
This will provide best overall FSAA image quality, with
greatest performance hit. This can be used up to a
resolution of 1024x768.
Force 2x
Horizontal Anti-aliasing.
With this option Ticked
the Horizontal resolution is up-sampled by a factor of 2,
then down-sampled by averaging the colours of a 2x1 pixel
block to form 1 pixel across the entire image. This will
provide improved FSAA image quality but for Horizontal lines
only, although may perform slightly slower than Force
2x Vertical Anti-aliasing.
This can be used up
to a resolution of 1024x768 otherwise it will be disabled.
Force 2x
Vertical Anti-aliasing.
With this option Ticked
the Vertical resolution is up-sampled by a factor of 2, then
down-sampled by averaging the colours of a 1x2 pixel block
to form 1 pixel across the entire image. This will provide
improved FSAA image quality but for Vertical lines only,
although may perform slightly faster than Force
2x Horizontal Anti-aliasing.
This can be used up
to a resolution of 1280x1024 otherwise it will be disabled.
Application
Specified Anti-aliasing.
Select this option to disable the use of FSAA in
OpenGL Applications/Games (default). This will yield
best performance.
Here’s
a shot of Serious Sam with Force 2x Vertical Anti-aliasing
in operation (Click on the image for the full size version).
Disable Waiting
for Vertical Sync. Using
this setting you may disable Vsync in all OpenGL
Games/Applications or let in-game settings determine whether
Vsync is enabled/disabled. Vsync effectively
limits the frame rate to your current refresh rate at a
given resolution. Performance can improve with Vsync disabled,
Ticking this setting, as frames are rendered as fast
as they can be regardless of refresh rate, although you may
experience image tearing &/or controller lag as a
result. With Vsync enabled, Unticked, you
won’t experience either image tearing nor controller lag,
although frame rate will be limited to your refresh rate. As
such I’d recommend enabling Vsync for best image
quality & disabling it when you intend to
benchmark system/game performance.
NOTE – With this setting Unticked it may still be
possible to disable Vsync using in-game settings, if
available.
Use Application
Specified Buffering. By default
(Unticked) the Kyro
1/2 attempts to use Triple Buffering. Triple buffering allocates a 3rd frame buffer. This frame buffer can
improve performance by allowing the hardware to render at
the same time that the 3D application performs other tasks.
When this setting is Ticked it will use whichever
Buffering is specified by the application – Single or
Double Buffering. Should the Application/Game in question
use a large amount of textures then you should Tick
this setting where it may help improve performance, this is
because Triple Buffering requires extra Video memory,
although on most Kyro 2 Graphic cards you should be able to
leave this Unticked at all times for best performance
regardless.
Force
Single Buffer.
When Ticked
this forces the Game/Application to render to the
front buffer only. This is recommended for optimal
performance & Video memory requirement reductions (Only
really an issue with 32MB Kyro 1/2s, not 64MB Kyro 2s).
However, this can also cause image tearing similar to disabling
Vsync. As a result I’d recommend leaving this setting Unticked
if you experience bad image tearing. If possible you should
leave this Ticked
however.
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