The OpenGL Shading Language version 1.28 http://www.opengl.org/registry/doc/G...ull.1.20.8.pdf has the following:

Code :
// Use the texture coordinate coord to do a texture lookup in the 3D texture currently bound to sampler.
vec4 texture3D (sampler3D sampler, vec3 coord [, float bias] )
My understanding is that WebGL implements The OpenGL Shading Language version 1.0 http://www.khronos.org/registry/gles...ion_1.0.17.pdf which does not support texture3D.

Is it possible to implement texture3D on WebGL?

Thanks in advance for your help.