unable to get caustics to work with spot light

i can get a caustics projection with a point light (though it is very dim - exposure is set to default):

but when i switch to Spot, i get this - basically nothing:

Jonathan, is there any chance you could post your blend file for the finished Spot caustics scene? this is taking me forever and it is just not working, which is a great pity because i really like the technique. 

thanks, julian 

  • spikeyxxx replied

    Hi Julian, the texture is outside of the cone of the Spotlight:

    Try rotating the Texture:

    This is probably also the solution to your other question (with the Flashlight Texture).