DistanceTex not working on production render

[BenAllen]

Playing around with using the DIstanceTex into a blend material to place certain textures in certain locations. I am finding that it works properly when doing an interactive render (image on the left), but when doing a production render (image on the right) without changing anything the effect stops working..

Anyone come across this and got a fix?

[hermit.crab]

Works fine on a simple scene, but maybe there's something specific in the setup. Mind if you attach (or send) the scene so we can take a look?

[BenAllen]

Works fine on a simple scene, but maybe there's something specific in the setup. Mind if you attach (or send) the scene so we can take a look?

Started saving it as a separate file to cut out any unnecessary file size and the problem sorted itself..