 | | | Re: Texture DPI | Re: Texture DPI 2003-12-26 - By Frank Patnaude
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I do my work in poster sized and never use dpi except for conversion.
dpi (dots per inch) = ppi (pixels per inch). This is how I figure out
how big a texture map is going to be:
Size of output: 32 inches by 24 inches printed
DPI/PPI: 150 (this should be a min of 72 and a max of 600. 150 is
standard and everything looks great)
Total Width in Pixels: 32 x 150 = 4800
Total Height in Pixels: 24 x 150 = 3600
Final Image Size: 4800x3600
Approximate Size of Object Displayed: 20% x 20% (this means that the
object will take up about 20% of the total size of the picture. I am
using a square in this example, but it could be 20% wide and 10% high,
etc.)
Approximate Pixels of Object Displayed: 960 x 720
Type of Texture Mapping: Flat (this is key since wrapping a texture
around a sphere, or onto a square or any other object will require a
larger texture, sometimes as much as x2 or x4 in size)
Approximate Texture Size: 960 x 720
Of course, I am dealing with posters and everything should be scaled
accordingly. A 10 inch by 8 inch full sheet of paper would be much
smaller and the image size for the screen can be anything from 640x480
to 1600x1024 depending on your needs. This type of process will need to
be done for each texture, but experience will allow you to guess with a
high level of accurancy once you get used to the way texture maps are
applied to objects.
--- Bruce Hart <bruce@(protected)> wrote:
> I've been told that you should basically just ignore DPI and work
> strictly with pixels until you need to output something for print
> (and then it seems like 300dpi is often the ticket). I think the more
>
> pixels you have in your bitmap texture map the better it can hold up
> to close camera scrutiny (but the longer it will take to render). So
> I guess the question is whether Carrra even looks at the DPI setting
> of a bitmap file when it's imported as a texture map (and if the
> answer is "no" then all that matters are pixels). If you render
> something from Carrara with the intent to print it, then I guess the
> dpi does become an issue? This seems to be a very tricky topic so if
> I'm wrong maybe someone can enlighten me.
>
>
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