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Carrara F.A.Q (Last Updated: 2024 Nov 05 6:06 am)

 

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Subject: Anti-alias


cwright ( ) posted Wed, 01 November 2000 at 7:29 PM · edited Fri, 26 July 2024 at 5:09 AM

Is there a buttun to turn up the quality for Anti-alias or is what you see all that there is? If that is the case I might go back to Infini D I'm doing simple text and it looks horrible at the edges. thank you for your help


epsilon ( ) posted Wed, 01 November 2000 at 8:08 PM

all i can sugest is you change the dpi from 72 to, well what ever try 200-300, and than change the size of the file.. this will make the image large and make it a lot more clear to view and than resize it in a picture viewer... anyone else have any suggestions.. epsilon Class of 00


AzChip ( ) posted Thu, 02 November 2000 at 9:46 AM

In RDS there's a button called "Adaptive Oversampling." It's in the render settings under the renderer tab. It took me a year to realize that this is RDS's version of anti-aliasing. Who knows where the term came from?!? I don't know what it'd be called in Carrara -- I'm sure the same feature must be there. Hope this helps!


litst ( ) posted Thu, 02 November 2000 at 10:16 AM

Cwright, To change the default anti-aliasing in Carrara, go in the render room, and change the oversampling to "best" in the properties tab . litst


ewinemiller ( ) posted Thu, 02 November 2000 at 11:06 AM

AzChip, I'm not sure that Ray Dream was using it this way, but Adaptive Oversampling is when you only do oversampling when you need it. One of the easiest ways to do antialiasing is to oversample. Each pixel might be made up of 2 or more rays from the ray tracer. It might be as complicated as casting a pattern of weighted rays so that the center ray has more input to the final pixel than the outer rays of the pattern. It might be as simple as rendering 4 pixels for each one you see and blending them. It easy to do, but it's obviously slower than just rendering one pixel. So what is adaptive oversampling? Since the most obvious aliased spots are usually on the edges of objects, or where there is high frequency change in say the normal vector or a shader, the only time you oversample is in those spots. For example, a large wall, shaded with a solid color and without a bump map doesn't really need antialiasing, but the edge of the wall does because you'll see the jaggies there. If you write a renderer smart enough to figure out the where it needs to do antialiasing and where it doesn't, you'll have a faster renderer. Eric Winemiller Digital Carvers Guild Freeware and commercial 3D extensions http://digitalcarversguild.com

Eric Winemiller
Digital Carvers Guild
Carrara and LightWave plug-ins


willf ( ) posted Thu, 02 November 2000 at 3:52 PM

Your other option is to reder the image about 50% larger then the final intended size & then reduce it. C & RDS always seem to have "jaggies" no-matter the settings (when compared to a similar d.p.i. image of a photo for example).


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