.blend assets not working

Since in this image there is no blender installed prefabs ussing .blend files are not rendered.

My Solution creating a Dockerfile with:

FROM gableroux/unity3d:2018.2.3f1

MAINTAINER ***@m***

RUN apt-get update && \
    apt-get install -y blender

I don't know if this should be included in the main Dockerimage since not everyone uses blender

EDIT: I only wanted to mention this since it took me nearly a week to find out that this is no shader problem