View Full Version : 92/HV/Volumetric antialiasing

05-08-2007, 07:20 AM
Finding my way into 92, managing to use Radiosity (final gather) in animation for the first time, getting on well with the new cameras, BUT
my current project has lots & lots of dangly twinkly cut glass wotsits, and I've got them doing nicely with Hypervoxels, and they render just fine & don't improve with antialiasing. When I started the project in 90 I c:help: ould turn off 'Volumetric antialiasing' and everthing else would antialias except the twinkly stuff. In 92 the hypervoxels seem to insist on antialiasing at great length.
Have I missed something as usual?

05-08-2007, 07:59 AM
ACT cameras behave like that - they cast rays into scene, and volumetrics are part of ray-traced scene.. With classic camera they're added at the end, in post-process like stage, so their AA can be turned on/off..

05-08-2007, 08:14 AM
I've noticed HV AA doesn't get any better if you use Adaptive sampling though if your HV are solid surfaces :P

05-08-2007, 08:17 AM
In fact, HV's don't get AA'd at all unless they're transparent :P Looks like a big bug...

Umm, further to that, I'm having a hard time getting them to AA nicely in the new act cameras :P

05-08-2007, 08:23 AM
Okay, now I'm befuddled... I just did a volume render, and it looked okay, and then when I went back to surface, it rendered lovely AA... Gotta dig a bit deeper into this I think...

05-08-2007, 08:27 AM
Doh, it's down to the reconstruction filter. On classic, opaque surface HVs don't get AA'd at all, no matter what level the AA is set to or if AS is on or off. Switch to gaussian, and you get AA.

05-08-2007, 08:29 AM
No, this still seems to be buggy. If I switch to classic, then back to gaussian, the gaussian doesn't seem to do anywhere near a good job... What is going on?

05-08-2007, 08:34 AM
Okay, this seems to be flickering AA on and off at random. Can someone please enlighten me as to what is going on with HV's and AA?

Start a new scene. Add a Null and make it a HV. Render... gives me different results (on or off) for AA every other time I tweak something.

05-08-2007, 08:45 AM
It's VIPER that kills antialiasing of HV's, it's been Fogged already.

05-08-2007, 09:27 AM
Ahhhh, I thought I was going out of my mind :) Thanks James.