UDK - reflection + cubemap and mask

Samfisher84

Hi

How do i use reflection in UDK and mask it of witch textures? tried doing it here with alpha.




And how do i use this cube map in UDK? just import it or? or cant? Thanks !!

Froyok

Your materials looks fine I find...
Maybe your alpha is wrong in the last lerp ?
Here my material, I use the specular map as the alpha :

Samfisher84

ahh crap my bad, remembered i never had a alpha! Do you happen to know how i would use a cubemap like that?

Oniram

looks like you were using the alpha slot of a texture sample that is an alpha. would be best to toss that file into the alpha slot of another texture.. just so you dont have to have separate files (a texture sample can hold up to 4 textures.. so if u have 4 alphas.. u can put all of them in 1 texture).

as far as using cubemaps in udk.. i typically just make my own within UDK. based off of a scene or something, but if you want a custom cubemap.. you need the individual splices.. then import them to udk idividually as texture samples.. then make a new cubemap (right click in content browser > new texture cube). then you will get a dialogue box asking for each different face of the cube.

Samfisher84

now when i have the cube set up as what do i use it as in the material editor? texture sample?

Oniram

just drag in a TextureSampleParameterCube. just right click and its in the texture section. or just search.

Samfisher84

Yeah i tried doing that but nothing

Froyok

Just a "texture sample" is fine if you use a "Reflection vector" node in input in the UV.

Samfisher84

naa "Coersion failed Parameters: Tangent reflection vector RG float2 > float 3

Froyok

That's because you use a Mask node which remove one channel (3 channels are needed in the uv input).
You can remove your mask I guess (like me)...

Visceral

Remove the mask and if im assuming what you want to make you could add a transform vector in between the reflection vector and the texture sample.

Samfisher84

Froyok wrote: »

That's because you use a Mask node which remove one channel (3 channels are needed in the uv input).
You can remove your mask I guess (like me)...

thanks it worked well