In response to Bald Eagle's question ...
http://news.povray.org/povray.newusers/message/%3Cweb.5a6f217fe33edc0fc437ac910%40news.povray.org%3E/#%3Cweb.5a6f217fe3
3edc0fc437ac910%40news.povray.org%3E

I don't know how your chipboards look like but here is my attempt to texture
one.

//====================================================
#include "woods.inc"

#declare CM_1 = color_map {[0 rgb <.8,.6,.2>/2]
                           [1 rgb <.8,.6,.2>]
                          }

#declare CM_2 = color_map {[0 rgb <.6,.5,.2>/2]
                           [1 rgb <.6,.5,.2>]
                          }

#declare T_Chip1 =
 texture { agate
  texture_map {
    [0.0 pigment {P_WoodGrain1B color_map {CM_1} scale .01}]
    [0.4 pigment {P_WoodGrain1B color_map {CM_2} scale .01}]
    [0.4 pigment {P_WoodGrain1A color_map {CM_1} rotate <45,45,45>}]
    [0.6 pigment {P_WoodGrain1A color_map {CM_1} rotate <30,30,30>}]
    [0.6 pigment {P_WoodGrain1B color_map {CM_2} scale .01}]
    [1.0 pigment {P_WoodGrain1B color_map {CM_1} scale .01}]

  }
  scale <1,.1,1>/2
  }
//====================================================

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Attachments:
Download 'chipboard.png' (415 KB)

Preview of image 'chipboard.png'

That looks kind of like plastic laminate.

It's that CHIP look that's been tricky:

https://www.google.com/search?q=osb&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiEl7mj_P3YAhXJ11MKHVYQCF4Q_AUICygC&biw=1661&bi
h=919

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"Bald Eagle" <cre### [at] netscapenet> wrote:
> That looks kind of like plastic laminate.
>
> It's that CHIP look that's been tricky:
>
>
https://www.google.com/search?q=osb&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiEl7mj_P3YAhXJ11MKHVYQCF4Q_AUICygC&biw=1661&
bi
> h=919

Ahhhh, you mean that cheap version... Maybe I'll try someting new.

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"Kontemplator" <haf### [at] yahoocom> wrote:

> Ahhhh, you mean that cheap version... Maybe I'll try someting new.

Well...
I think what you were thinking of is called "MDF" which is small granular bits
of wood.

OSB is "coarse" and is used as structural sheathing, and I must say I've been
impressed by its strength and resilience to the elements.  As crappy as it
looks, it's a pretty highly engineered sheet.


I gave Alain's suggestion a go yesterday, and I pretty much got the same thing
I've ended up with in previous experiments.  Maybe it's a matter of fine tuning
the textures or the crackle pattern...  I don't really know.

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"Bald Eagle" <cre### [at] netscapenet> wrote:
> "Kontemplator" <haf### [at] yahoocom> wrote:
>
> > Ahhhh, you mean that cheap version... Maybe I'll try someting new.
>
> Well...
> I think what you were thinking of is called "MDF" which is small granular bits
> of wood.
>
> OSB is "coarse" and is used as structural sheathing, and I must say I've been
> impressed by its strength and resilience to the elements.  As crappy as it
> looks, it's a pretty highly engineered sheet.
>
And then there's cheap 'particleboard'-- lind of like MDF but with larger wood
sawdust grains. That stuff is OK when dry-- but get it wet and you can punch
your fist through it.

I assume OSB is what I call 'chip board'-- larger roughly-triangular (or
odd-shaped) chunks or slices of wood, pressed and glued together randomly. Off
the top of my head, I'm thinking that some kind of (sophisticated) crackle or
facets pigment/pattern would be a way to go.

In the image, I'm seeing what look like un-wanted moire patterns on the right
side...

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Version 2/???

looks more recycled now :)

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Attachments:
Download 'spanplatte.png' (448 KB)

Preview of image 'spanplatte.png'

Version 3/3

Some days you just have to bite a OSB board. I think I'm done. I'ts not getting
better.

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Attachments:
Download 'spanplatte_03.png' (405 KB)

Preview of image 'spanplatte_03.png'

Kontemplator wrote on 31/01/2018 12:08:
> Version 3/3
> 
> Some days you just have to bite a OSB board. I think I'm done. I'ts not getting
> better.
> 
This one is interesting.
Paolo

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This one actually looks a lot like a pine-borer chewed plank, which is a great
texture in its own right!  :)

I was reluctant to post this question, because I was sure it was something
trivial, but apparently it actually is a bit more challenging than it looks at
first glance  :O

I'd be happy with a "chipboard" since the dimensions of the chips would probably
be suited to simulation by a crackle or other similar pattern.  OSB is "oriented
strand board", so it's composed of larger strips of wood that are, as the name
implies, oriented along one axis, thus giving it structural strength when used
as intended.  Whatever they use for a binder sure seems to be fairly water
resistant.

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> "Bald Eagle" <cre### [at] netscapenet> wrote:
>> "Kontemplator" <haf### [at] yahoocom> wrote:
>>
>>> Ahhhh, you mean that cheap version... Maybe I'll try someting new.
>>
>> Well...
>> I think what you were thinking of is called "MDF" which is small granular bits
>> of wood.
>>
>> OSB is "coarse" and is used as structural sheathing, and I must say I've been
>> impressed by its strength and resilience to the elements.  As crappy as it
>> looks, it's a pretty highly engineered sheet.
>>
> And then there's cheap 'particleboard'-- lind of like MDF but with larger wood
> sawdust grains. That stuff is OK when dry-- but get it wet and you can punch
> your fist through it.
> 

It all depend if you have the "regular" board or the waterproof board.
The regular boards use a water based glue, while the waterproof boards 
use alkide of acrylic glues that are not affected by water.
The waterproof ones obviously cost more.

If you go for the MDF look, then you rotate around all 3 axis and use a 
small scale.
If you go for the chip board look, you should rotate only around the 
axis perpendicular to the surface and use a large scale.

If you use the cells pattern, it need some turbulence. In this case, you 
need to add an inverse turbulence to your rotated wood texture.
Add turbulence 0.1 to the cells pattern and turbulence -0.1 to your wood 
to compensate.

If you use the crackle pattern, use the solid option.

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