Added automatic rendering engine selection based on the .blend
file to avoid incompatibility caused by BLENDER_RENDERER
only being available in <2.8 and EEVEE
introduced in >=2.8.
Added automatic rendering engine selection based on the .blend
file to avoid incompatibility caused by BLENDER_RENDERER
only being available in <2.8 and EEVEE
introduced in >=2.8.