another d demoscene entry

[#ponce]

> The only suspicious thing in the log is this, which appears twice:
> 
> ---
> Fragment shader was successfully compiled to run on hardware.
> Fragment shader(s) linked, vertex shader(s) linked.
>   Validation failed - samplers of different types are bound to the same 
> texture image unit.
> ---
> 
> 
> Doesn't look that bad, though.  I'll try updating the driver and see.

I'm totally clueless on this one.