Done in Blender and postprocessed in GIMP.
Wow! Character design is so so so cool!
Haha! Nice one! Maybe you could add something to the background and match the lighting of the characters to it but other than that it’s great.
My only crit is that both characters look the same way. One would guess from the position of the riders arms that his 'steed’s head would be turned to his right.
Cool image, well designed and executed!