I wonder is it possible to introduce uv mapping for isosurfaces
(and for other objects) by specify u-function and v-function just
like isofunctions are defined. Within SDL it could be declared this way:

isosurface{
  function{ .... }
  /* isosurface stuff */
  uv_mapping function{ f_u(x,y,z) } , function { f_v(x,y,z) } pigment/normal/texture
}

where f_u and f_v are functions to calculate coordinates for uv_mapping

I wait for 3.5 sources to check implementation possibilities

ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)|_((x+y)*.7,z,.1)|_((x+y+2)*.7,z,.1)|_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35

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