GBASS (Generalized Bayesian Additive Spline Surface) is an R package for fitting BASS models with flexible likelihoods including the (t), (Horseshoe), Asymmetric Laplace (for quantile regression) and Normal-Wald likelihoods.
To install the GBASS package, type
# install.packages("devtools")
devtools::install_github("knrumsey-lanl/GBASS")