Artifacts in Render which actually don't exists geometrically I have a plane which had a Boolean with a text converted to mesh.
This is the render
There are visible imperfections in this which i think are called artifacts but i can be wrong

These imperfections don't exist in the geometrical form , which means there is no geometry there , just a flat plain
All modifiers on the planes are applied
im using the Cycles rendering engine

Also visible there are no other objects in the scene causing any interceptions , so how is this happening.
Imerfections are also not visible in the render mode in blender
This could come from having to little geometry on your plane.
Basically Blender shows you editable points which we consider geo but uses triangles to compute the mesh. (not the most accurate description but oh well...)
Your boolean creates very long triangles which aren't displayed in the viewport but create problems in the render.
To fix this you can just subdivide the plane a bunch of times before applying the boolean.
Hope this helps :)