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Posted
on December 04, 2001 by Thomas
McGuire
Select
the 3D Optimisation
tab, then the Direct3D
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 otherwise it will be disabled.
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.
This options allows the application to choose the FSAA
level, basically this means disabled. Select this
option if you wish to disable FSAA support (default).
This will yield best overall performance.
Here’s
a shot of Sacrifice with Force 4x (2x2) 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 Direct3D
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 (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.
Defer
Render until Flip.
When Ticked
rendering of a scene is deferred until the full scene is
supplied. This can solve some image artefacts although may
cause others to appear instead. In some cases performance
can improve too.
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