Nice pic, I'd love to see it when it's further along.  A question about the
tea: did you use interior scattering media to give it the colour?  If not,
that might give you better light fading within the liquid, possibly more
realistic than using fade_distance etc.  I only mention it because I was
just now playing around with a murky-looking sea effect, and with less
'murk' it might have the sort of properties you're after.  I'll post
something up when I get it right.

L
-

Post a reply to this message

Loki wrote:

> Nice pic, I'd love to see it when it's further along.  A question about
> the
> tea: did you use interior scattering media to give it the colour?  If not,
> that might give you better light fading within the liquid, possibly more
> realistic than using fade_distance etc.  I only mention it because I was
> just now playing around with a murky-looking sea effect, and with less
> 'murk' it might have the sort of properties you're after.  I'll post
> something up when I get it right.
> 
> L
> -

No, no media, The tea is transparent, I thought media would cloud it
which wouldn't be right. I was hoping that fade_power 1001 would
do the trick, but apparently not :-(

-- 
Bill Hails
http://thyme.homelinux.net/

Post a reply to this message

> No, no media, The tea is transparent, I thought media would cloud it
> which wouldn't be right. I was hoping that fade_power 1001 would
> do the trick, but apparently not :-(
>
> --
> Bill Hails
> http://thyme.homelinux.net/

It wouldn't have to be too cloudy - I was thinking of an almost
imperceptible amount.  Thing is, with a scattering media you have more
control over the final outcome because you can change colour/extinction/etc
independently, whereas fade_power seems a little limited in some cases.  I
was thinking maybe a tiny bit of media might help.  But then, maybe not!

L
-

Post a reply to this message

Excellent start. I look forward to seeing the progress on your scene.

The porcelain looks very good, thought it gives the impression of being 
cheap cafeteria ceramic, as somebody has already pointed out. However, 
it imitates that material very well! With some tweaking I'm sure you'll 
get the right texture.

Fernando.

Post a reply to this message

Bill Hails nous apporta ses lumieres en ce 2005-05-11 23:05:
> Hi, back to basics.
> 
> Lathes and procedural textures/materials
> 
> 1. I have no idea yet how to mould a handle and a spout
> onto the teapot, but I hope I'll figure something out.
You can try: sphere_sweep, spline + blob, isosurface, torus.
> 
> 
> 4. I realise the bubble in the tea looks fake, I'll work more
> on that.
The buble should protude a little bit in the meniscus, ie. push the near part a small
bit upward. 
You may need to use a blob or an isosurface for the whole thea.

> 
> My big question is, I'd like to get some turbulence and
> variation in the colour of the tea, especially around the
> tea leaves, due to convection, but again I'm at a loss.
Using some media will enable to modulate the density around the leaves. You can then
add some 
turbulence to that variable density. That combined with fade_color fade_distance can
get prety 
realistic.
> 
> I'd appreciate any helpful criticisms, I can post source
> for the textures if anyone's interested.
> 
> 
> 
> ------------------------------------------------------------------------
> 

Alain

Post a reply to this message

Loki wrote:

> 
>> No, no media, The tea is transparent, I thought media would cloud it
>> which wouldn't be right. I was hoping that fade_power 1001 would
>> do the trick, but apparently not :-(
>>
>> --
>> Bill Hails
>> http://thyme.homelinux.net/
> 
> It wouldn't have to be too cloudy - I was thinking of an almost
> imperceptible amount.  Thing is, with a scattering media you have more
> control over the final outcome because you can change
> colour/extinction/etc
> independently, whereas fade_power seems a little limited in some cases.  I
> was thinking maybe a tiny bit of media might help.  But then, maybe not!
> 
> L
> -

I'm going to try media, thanks.

-- 
Bill Hails
http://thyme.homelinux.net/

Post a reply to this message

Fernando G. del Cueto wrote:

> Excellent start. I look forward to seeing the progress on your scene.

Thanks.

> 
> The porcelain looks very good, thought it gives the impression of being
> cheap cafeteria ceramic, as somebody has already pointed out. However,
> it imitates that material very well! With some tweaking I'm sure you'll
> get the right texture.

It's as near as I can get to the real pot I'm working from, just not quite
there.

> Fernando.

-- 
Bill Hails
http://thyme.homelinux.net/

Post a reply to this message

Alain wrote:

> Bill Hails nous apporta ses lumieres en ce 2005-05-11 23:05:
>> Hi, back to basics.
>> 
>> Lathes and procedural textures/materials
>> 
>> 1. I have no idea yet how to mould a handle and a spout
>> onto the teapot, but I hope I'll figure something out.
> You can try: sphere_sweep, spline + blob, isosurface, torus.

Yeah, Making the handle and spout is no big deal, it's getting them to 
smoothly mould to the body is the trick. I like the lathe, but after an 
abortive attempt at a "Welding" macro (trace(), binary search, sphere 
sweeps) I'm coming round to using a single blob for the handle, spout and 
main bulb of the pot, then letting the lathe do the rim and base of the pot 
only.

>> 
>> 4. I realise the bubble in the tea looks fake, I'll work more
>> on that.
> The buble should protude a little bit in the meniscus, ie. push the near
> part a small bit upward. You may need to use a blob or an isosurface for
> the whole thea.

It's actually only positioned by eye atm, I'm planning to use trace(), but 
yes I take your point, it doesn't itself exhibit any meniscus.

> 
> Alain

-- 
Bill Hails
http://thyme.homelinux.net/

Post a reply to this message

On Wed, 11 May 2005 17:05:14 -0400, Bill Hails  
<bil### [at] europeyahoo-inccom> wrote:
> I'd appreciate any helpful criticisms,

I have no idea of how to do it, but the surface of real hot tea shows neat  
swirls of vapor that have condensed and fallen back on the surface.   
Hypnotic ...

Post a reply to this message

Bob Bagwill wrote:

> On Wed, 11 May 2005 17:05:14 -0400, Bill Hails
> <bil### [at] europeyahoo-inccom> wrote:
>> I'd appreciate any helpful criticisms,
> 
> I have no idea of how to do it, but the surface of real hot tea shows neat
> swirls of vapor that have condensed and fallen back on the surface.
> Hypnotic ...

Thanks for the suggestion. I'm in the middle of finishing the pot, (handle, 
spout) then I'll probably give the wood texture some attention. Of course 
the liquid itself is the most complicated component, I'm leaving that till 
last so I can give it my best efforts. I'll try to take your comments on 
board.

-- 
Bill Hails
http://thyme.homelinux.net/

Post a reply to this message