Converting my Shanghai Skyline Model into a Voxel File

So I wanted to turn my Sketchup model of Shanghai into a voxel model and possibly use it to create a Minecraft map or something. I tried converting my SketchUp file into an obj file and then using magicavoxel to convert the obj file into a vox file. However, when I do this the voxels are slightly off when making curves and more detailed shapes. I also want the textures and colors I have in the SketchUp file to transfer over into colored voxels. I don’t want a single uniform color. Does anyone know how to do this? Software tools, plugins, or application recommendations would be greatly appreciated. The scale I want to use is 1 voxel = 2 meters.I kinda want it to look something like the Minecraft map below.