Ok, I agree... I see your point, amplitude is the bad choice of word but
still, the bleeding gives the illusion of a change of amplitude even if it's
not that... that's what normal maps do, they fake a displacement without
displacing anything. So amplitude may be the wrong choice of word for the
implementation but to the user, that's the effect they see. Anyway, there's
no point in arguing about a bad choice of word here. D3 called his parameter
"influence" anyway.
-----Original Message-----
From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf Of
Raffaele Fragapane
Sent: Tuesday, February 28, 2006 5:03 PM
To: XSI(at)Softimage.COM
Subject: Re: XSI Normal Map node
I remember that much, but that's a blending, not an amplitude :)
you couldn't take the normal map and make it look like if suddenly the
object had a different thickness of the bump.
anyway...
******************************
| Raffaele Fragapane |
| Rising Sun Pictures |
| "Remember, TD is for TopDog" |
******************************
Mathieu Leclaire wrote:
>Yeah well as I can see, D3 influence parameter will control the
>interpolation between the normal from the normal map and the normal from
the
>original surface (or you can pass it another normal map in the normal input
>and it would use that one instead of the original surface normal to
>calculate the interpolation)... so yes, there is an amplitude parameter in
>D3.
>
>
>Mathieu Leclaire
>R&D Programmer
>Hybride Technologies
>
>-----Original Message-----
>From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM]On Behalf Of
>Andre DeAngelis
>Sent: Tuesday, February 28, 2006 9:18 AM
>To: XSI(at)Softimage.COM
>Subject: RE: XSI Normal Map node
>
>That makes sense Raffaele but the D3 nromal shader does provide an
influence
>parameter that does appear to work pretty much the way a bump map amplitude
>works.
>
>AD
>
>
>-----Original Message-----
>From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of
>Raffaele Fragapane
>Sent: Tuesday, February 28, 2006 1:16 AM
>To: XSI(at)Softimage.COM
>Subject: Re: XSI Normal Map node
>
>amplitude on a normal map?
>after the relief/displacement derived normals have been calculated, or if
>you're using a straight baked normals map (derivated from the difference
>between geometries, like in Zbrush), you don't have an "amplitude" anymore.
>
>an amplitude is only possible when setting a height for a relief mapping of
>some sorts, once the normals are derivated there's no amplitude you can set
>for them.
>
>I don't remember D3 having an amplitude parameter and I can't see how it
>could have had one, but then I haven't used it in ages and I'm maybe
missing
>something.
>
> ******************************
>| Raffaele Fragapane |
>| Rising Sun Pictures |
>| "Remember, TD is for TopDog" |
> ******************************
>
>
>
>Andre DeAngelis wrote:
>
>
>
>>Yes the XSI native normal map nodes seem to be lacking somewhat. I
>>also noticed that there is no control for amplitude either.
>>You'd think they woudl have though of these paramters when creating
>>them, seeing as they already existed in D3.
>>
>>----------------------------------------------------------------------
>>--
>>*From:* owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] *On
>>Behalf Of *Michaël Bentitou
>>*Sent:* Monday, February 27, 2006 3:23 PM
>>*To:* XSI(at)Softimage.COM
>>*Subject:* XSI Normal Map node
>>
>>Hey list -
>>
>>Maybe I'm missing something, but there doesn't seem to be a way to set
>>the repeats for a normal map texture. I don't see a way of setting the
>>repeats anywhere in the XSI Normal Map Node - even if you click on
>>Edit, it brings another PPG to mess with the UVW Transformation, the
>>Wrapping, even the Swap UV - but no repeats ??
>>
>>Anyway I'm using the D3 Node instead for the time being but
>>nonetheless I'm still curious as to why we can't set the repeats... Anyone
>>
>>
>?
>
>
>>-=mb.
>>
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>>
>>
>>
>>
>
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