Having searched quite a bit about heliostat field layout programms i don't think there is currently a free one, with the only exception being CSPsim software.(http://skipper.athost.net/CSPsim.htm)

But it is not an "official" programm. hope that helps

Hello,

I need to get visual HFLCAL, any idea?

Take a look at SolarPILOT. It is free and open source.

https://www.nrel.gov/csp/solarpilot.html

https://github.com/NREL/solarpilot

SolarPILOT looks great !

I would like to add a mention here of some new work on this topic:

https://github.com/anustg/solstice-scripts

These scripts, together with the Solstice high-speed ray-tracing softare from Cyril Caliot at CNRS-PROMES, allow for some basic layout design and optimisation of CSP fields. It is not as sophisticated as SolarPILOT, but may be of interest nonetheless, since Solstice allows you to integrate arbitrarily-shaped receivers and is a fully-fledged Monte Carlo ray tracing tool.

Here are some screenshots of using SolarPILOT to generate efficency matrix and layout diagram.