[Bf-funboard] A needed node.

Patrik Andersson patrik.andersson.se at gmail.com
Tue Jul 2 07:52:31 CEST 2013

Well, just export my first script to .osl and provide the community with them, I think it does what you are asking for.

The first shader is a OSL shader/Node for random color depending on object. 

Link it with object-info->random, the rate make it possible to give a better spread for your randomness.

shader RandomColor(
    float objInd = 1.0,
    float rate = 1000.0,
    output color RColor = 0.8)
    RColor = noise("cell",objInd*rate);

Eg. of a random number node, with a seed input, gives u a perlin-noise. Well I don't suggest to use this one, it is highly dependent on the seed value.

shader RandomNumber(
	float seed,
	output float rn = 1.0)
	rn = noise("perlin",seed);

Best regards


On Jul 1, 2013, at 9:34 PM, Knapp wrote:

> On Mon, Jul 1, 2013 at 9:14 PM, Patrik Andersson <
> patrik.andersson.se at gmail.com> wrote:
>> Well can't you just use the OSL standard function for noise? (see
>> https://github.com/imageworks/OpenShadingLanguage/raw/master/src/doc/osl-languagespec.pdf
>> )
>> It says that "noise" is able to return a random
>> colour/point/normal-vector. If you would like an object depending noise,
>> combine it object:random number with e.g. cellnoise.
>> An example is shown in built-in the "noise" template for osl-shaders.
>> Best regards
>> Patrik
> I have not had time to look at your idea but a big problem is that most
> artists simply want a random number and they know nothing of OSL.
> -- 
> Douglas E Knapp
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