How to build a reflective material?

Firedrakan · Apr 2014

Hello everybody,
I'm writing to you today because I have several problems with UE4.
I'd like to create a reflective material. I tried to follow the pipeline I adopted several times using UDK but I don't know how to link a texture with my SphereReflectionActor. In fact, I was looking for the Texture target parameter in the attributes but this is missing.

image hosting

I wanted to achieve the same result I was able to obtain using the Reflection Vector + Transform Vector workflow in UDK.

Am I using the right actor?
If it is the case, How can I link my RenderTarget texture to my actor?

Thank you very much for your help,

Have a nice day.

Money · Apr 2014

You don't have to link RenderTargetTexture anymore. You'll need to bake lighting and then reflection captures will do it's work.
Also reflectivity is tied to your roughness, so for more reflection in the material use lower value in your roughness input of the material.
There's more on this page how to setup everything.

https://docs.unrealengine.com/latest/INT/Engine/Rendering/LightingAndShadows/ReflectionEnvironment/index.html

passerby · Apr 2014

Ya shader will automatically use the cubes made from the closest capture actor.

Firedrakan · Apr 2014

Thank you very much for your replies. So, in the material editor, this uses automatically the actor? I just have to set my roughness parameter?

Gilgamesh · Apr 2014

Both metallic and roughness yes

Money · Apr 2014

Also see this one. If you need more accurate reflection on some object, you'll want to place some actor right near it with smaller range.

https://docs.unrealengine.com/latest/INT/Resources/Showcases/Reflections/index.html

Firedrakan · Apr 2014

Thank you very much for the links and suggestions. I read those articles yesterday but honestly I did not get the fact that the Texture Target connection was not necessary anymore.

As always, thank you very very much for your help. i have no words to describe how much this community has been so kind and helpful over the past months.

Firedrakan · Apr 2014

UP:

Ok after trying a little bit with reflection I'm still not so happy with the results. The problem is that the image reflected on the surface is very poor. In fact, as you can see in the following screenshot, the reflected environment is rapresented by a very "pixelated" reflection. Basically, I cannot get a sharp rapresentation as i could achieve with UDK. I tried different position for mY sphereReflectionActor but I was wondering is there exists a parameter somewhere to define the sharpenss/ resolution/quality of my reflection.

upload immagini

How to build a reflective material?

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