I trying to set a mirror material, but when its rendered the reflection is in a realy poor quality and with no sense reflections…
Are you using roughness = 0 and metallic = 1 for the mirror-like material?
Shapespark uses approximate technique for reflections, so the reflections might be distorted. See: Mirror problems - #2 by wojtek for more information.
yes i using roughness = 0 and metallic = 1, i will se the link you gave me, thanks