Bob Hughes wrote:
> "Chambers" <bdc### [at] yahoocom> wrote in message 
> news:43fcff1e@news.povray.org...
>> OK, here's the next draft.  Some obvious, some not so obvious 
>> improvements.
> 
> I missed this before now since it's png. Opened them to take a look this 
> time.

Sorry, I hadn't thought of that.  I'll put future postings in JPG.

>> - The texture for the dirt in the jar.  This is just bugging me.
> 
> Your dirt has the old POV 'crand' appearance, so maybe it should be less 
> uniform. Possibly a layering needed with less air in the lowest parts? 
> That's what occurs to me when I think of dirt in a jar. Could be as simple 
> as using a turbulent gradient y texture map.

Currently, I'm using a constant color with small scale bumps.  I'll try 
the color_map (bozo might work better than turbulent gradient, but I'll 
try both).

>> - The bricks (and mortar) show the correct bumpiness on the window-side;
>> but the other sides are completely smooth.
> 
> Maybe changing the Brick_Func line to this?
> 
> Brick_Func(x,y,z)*(f_noise3d(x*0.02,y*0.02,z*0.02)/2)

Hmm... now every side of the bricks is smooth.

If I can't get them working, then I'll just bite the bullet and fake it 
with patterned textures and normal maps.  I'd much prefer the isosurface 
version, though - I'm not that great with textures (as you can see).

>> I've got a bunch of other stuff I want to do with this image
> 
> You lost the double reflection in the window that the first image had. That 
> really grabbed my attention because I think it adds to any realism you might 
> be after.

That's interesting - technically, the double reflection is still there 
(it's caused by a reflection "inside" the window, as well as the 
reflection on the surface).  I can even see it if I look closely.  Must 
be something with the reflection values (I think I lowered them this 
time) or the lighting - I'll see if I can get that back.

(I *could* also increase the thickness of the window, so the double 
reflection is more obvious as it would be offset more from the main one 
- not technically accurate, but artistically useful anyway).

...Chambers

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