  We present recent evolutions of the detailed opacity code SCO-RCG which
combines statistical modelings of levels and lines with fine-structure
calculations. The code now includes the Partially-Resolved-Transition-Array
model, which allows one to replace a complex transition array by a small-scale
detailed calculation preserving energy and variance of the genuine transition
array and yielding improved high-order moments. An approximate method for
studying the impact of strong magnetic field on opacity and emissivity was also
recently implemented. The Zeeman line profile is modeled by fourth-order
Gram-Charlier expansion series, which is a Gaussian multiplied by a linear
combination of Hermite polynomials. Electron collisional line broadening is
often modeled by a Lorentzian function and one has to calculate the convolution
of a Lorentzian with Gram-Charlier distribution for a huge number of spectral
lines. Since the numerical cost of the direct convolution would be prohibitive,
we propose, in order to obtain the resulting profile, a fast and precise
algorithm, relying on a representation of the Gaussian by cubic splines.
