Hi all,

The last days I'm playing around with the texture of a column I'm working on. I
took T_STONE2 as basis and added a normal that should give it a crafted rough
look. What do you think of it? I still miss a bit the regularity of the hammer
dents a stone cutter would leave. Any suggestions?

Thanks in advance,
Alil

Here is the code for the texture:

#declare normal1 = normal { leopard -20 scale .0015 }
#declare normal2 = normal { crackle -20 scale .01 }

#declare T_RoughSandStone =
texture{T_Grnt0  scale <2, 3, 2> rotate <0, 0, 40> scale .0625}
texture{T_Grnt7a scale <1.3, 2, 1.3> rotate <0, 0, -30> rotate <40, 0, 0> scale
..0625

normal {
average
      normal_map {
        [1.0  normal1 ]
        [1.2  normal2 ]
      }
}
finish { diffuse 0.9 phong 0.1}
}

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Attachments:
Download 'wip_gothicstylecolumn.png' (786 KB)

Preview of image 'wip_gothicstylecolumn.png'

> Hi all,
>
> The last days I'm playing around with the texture of a column I'm working on. I
> took T_STONE2 as basis and added a normal that should give it a crafted rough
> look. What do you think of it? I still miss a bit the regularity of the hammer
> dents a stone cutter would leave. Any suggestions?
>
> Thanks in advance,
> Alil
>

You need to give it some directivity.
The normals should be in the direction of the grooved areas. Vertical 
where cylindrical shafts meet, horizontal along the details of the 
bases, especialy inside the grooves.

To give that directivity, you could use the spiral1 or spiral2 pattern 
scaled small verticaly for the circular part of the bases.
I'd go for a slightly perturbed radial with a high frequency elsewhere, 
something like normal{radial frequency 1000 turbulence 0.1}
Or maybe this will be beter:
normal{spiral2 70 scale<0.01,5,0.01> turbulence 0.2}
You'll probably need to apply that one individualy to each components.

If memory use start to become an isue, you may need to replace your 
crackle by some other pattern. Possibly cells with some amount of 
turbulence, or possibly facets, also with some turbulence.

Nice modeling.


Alain

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Alain <aze### [at] qwertyorg> wrote:

> You need to give it some directivity.
> The normals should be in the direction of the grooved areas. Vertical
> where cylindrical shafts meet, horizontal along the details of the
> bases, especialy inside the grooves.
>
> To give that directivity, you could use the spiral1 or spiral2 pattern
> scaled small verticaly for the circular part of the bases.
> I'd go for a slightly perturbed radial with a high frequency elsewhere,
> something like normal{radial frequency 1000 turbulence 0.1}
> Or maybe this will be beter:
> normal{spiral2 70 scale<0.01,5,0.01> turbulence 0.2}

Thanks for the tip. Yes the directivity with spiral2 looks much better on the
vertical parts.

> You'll probably need to apply that one individualy to each components.
I hoped that I could avoid this because I want the pigment to look like it was
carved out of one big stone block. But maybe it looks even better if the base is
different. Will work on it and post a picture.

> If memory use start to become an isue, you may need to replace your
> crackle by some other pattern. Possibly cells with some amount of
> turbulence, or possibly facets, also with some turbulence.
>
> Nice modeling.

Thanks.
<warning advertisement>
I did the column mainly for testing my open source modeler Y.A.P.R.M. I did
there a whole set of columns based on the basic element you can see in the
picture. I will provide them on the Y.A.P.R.M. webpage when I have finished the
texturing.

Alil

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Hi,

With spiral2 for the vertical parts and planar for horizontal aligned elements
the column now looks like this.

Alil

ps.: added a full view of the column to.

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Attachments:
Download 'wip_gothicstylecolumn_2.png' (1007 KB)

Preview of image 'wip_gothicstylecolumn_2.png'