Is there a simple way to draw a black border around a box or plane actor?
What you are looking for is a post process material.
Here is a link to the documentation of how to set up and use a post process shader.
Cheers
I’d like to make a grid (1000x1000 squares) where each box has an internal border. Are you sure post process is suitable for something like this?
Maybe a texture is better in that case?
I really have no idea what you are doing or trying to accomplish with this so I can only answer what I assume you are looking for which quite likely is not correct.
Dear Taurian, you can export your object with normals are flipped, than scale a bit than your box or plane actor.
Now, assign an unlit glow material.
Ps:You need to know at least one 3d productiton program to flip normal of any polygon of the objects offcourse. (Max, maya, blender, modo etc.)
