uniform sampler2D tex_entry;
uniform sampler2D tex_exit;
uniform sampler3D tex_intensity;
uniform sampler3D tex_gradient;
uniform sampler1D tex_transfer;
uniform float dz;

varying vec3 normal;
varying vec3 v;
varying vec3 lightvec;
varying mat3 normalMatrix;

void main(){
	
	vec4 transferred = texture1D(tex_transfer, v.y);
	gl_FragColor = transferred;

}