What does screen space reflections do?
Screen-space Reflection is a technique for reusing screen-space data to calculate reflections. It is commonly used to create more subtle reflections such as on wet floor surfaces or in puddles. Screen-space Reflection is an expensive technique, but when used correctly can give great results.
Is screen space reflection expensive?
Screen Space Reflection is an expensive technique, but when used correctly can give great results. Screen Space Reflection is only available in the deferred rendering path as it relies on the Normals G-Buffer. As it is an expensive effect it is not recommended to be used on mobile.
How do I get Eevee to reflect objects?
By default, Eevee will reflect the HDRI and the lights but it won’t reflect the objects of your scene. For reflective volumes, you need to create a Light Probe > Reflection Cubemap in order to reflect the object (s), as explained here by Tutor4u. It’s a kind of trick to recreate a proper reflection.
How can I get proper Reflections instead of this box?
I have tried all the settings eg. screen space reflections, added a reflection plane, cube map reflection but nothing works. Q: How do I get proper reflections instead of this box? By default, Eevee will reflect the HDRI and the lights but it won’t reflect the objects of your scene.
How to get proper reflections in Blender Stack Exchange?
For a volume, here is a Suzanne, I gave it a Glossy node, it reflects the world HDRI and the lights but it doesn’t reflect the objects (here the checker ground): In order to make Suzanne reflect the objects of the scene you need to create a Light Probe > Reflection Cubemap that contains her.
When do I need to refresh the reflection?
Nota Bene: The reflection won’t be automatically refreshed when you move an object, you’ll need to recalculate. It means that if you animate an object you will need to calculate each frame. The Light Probe > Irradiance Volume as nothing to do with reflection, it is used to bake the indirect lighting.