Water depth World Based

[ANT0_21]

I’m stuck with this problem:
I have 2 materials : a water material and a sand material.
I’m trying to get the value of the water depth world based by the Z axis ( not camera based ).
I tried a lot of node like depthfade ,WorldPositionBehindTranslucency , pixel/scene depth , … that give me value like the green or the orange one but i’m looking for the black value.

What i got : (If the camera don’t see the sand under water the node don’t give the height value)

What i’m trying to do: (I want that even if the camera don’t see the sand under the water the node give the height value )

[anonymous_user_fbe2d247]

You can bake height map of the sand and read it from texture at water material.

[ANT0_21]

@anonymous_user_fbe2d247

You can bake height map of the sand and read it from texture at water material.

Is there a way to make it dynamic ?

[anonymous_user_fbe2d247]

@ANT0_21

Is there a way to make it dynamic ?

Draw sand meshes with ortho camera with SceneCapture2d. Last time I tested depth rendering it didn’t work with ortho projection so I would use special material for sand meshes and draw height to color target. This scene capture can follow the player so you only need to draw close by area.

[Arkiras]

@anonymous_user_fbe2d247

Last time I tested depth rendering it didn’t work with ortho projection

Works in 4.25, doing it one of my levels

[ANT0_21]

​DONE !
Thanks for your help !
Here is the result in my test world :

https://forums.unrealengine.com/core/image/gif;base64
​​​

Quick recap:
I putted my sand mesh in the Scene Capture 2D BP, set Projection Type to Orthographic, adjusted the camera position and set the Texture target to a TextureRenderTarget
In my material I imported texture and remapped the value to get float values between 0 and 1 and I got the mask i needed.