Attached is a jpg of part of a simple scene I am doing that involves
metal textures. At present, the render is taking _far_ too long, because
to avoid aliasing errors, I've had to use sampling method 2 at a depth
of 5. The texture is as follows...

texture
        {
        pigment
                {
                colour rgb <0.72,0.728,0.744>
                }

        normal
                {
                spiral1
                1
                frequency 25
                bump_size 0.33
                accuracy 0.0008
                rotate <90,0,0>
                }

        finish
                {
                ambient 0.05
                diffuse 0.95
                specular 0.96
                roughness 0.0005
                phong 0.43
                phong_size 25
                brilliance 3.15
                reflection 0.33
                reflect_metallic
                metallic on
                }
        }

Is there a quicker way to achieve similar results, specifically, with
the normal to get the spiralling effect?

MJL

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Attachments:
Download 'metaltex.jpg' (19 KB)

Preview of image 'metaltex.jpg'