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		| Paper: | 
		MULTI3D: A Domain-Decomposed 3D Radiative Transfer Code | 
	 
	
		| Volume: | 
		415, The Second Hinode Science Meeting: Beyond Discovery-Toward Understanding | 
	 
	
		| Page: | 
		87 | 
	 
	
		| Authors: | 
		Leenaarts, J.; Carlsson M. | 
	 
	
	
		| Abstract: | 
		We present MULTI3D, a 3D radiative transfer code currently under development. It is optimized for computing NLTE problems based on (radiation-)MHD models of stellar atmospheres. MULTI3D is based on MULTI and includes most of the physics present in that code. MULTI3D was first written as a serial code by Botnen (1997) and has recently been upgraded to an MPI-parallelized, domain-decomposed version. The code has so far successfully been run on up to 64 processors, solving the NLTE radiative transfer for a six-level Ca II atom with 400 frequency points in an atmosphere of 256 × 128 × 108 grid points. | 
	 
	
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