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Translucent Material Receive and Cast Shadows

Translucent Material Receive and Cast Shadows

Engine version: 4.19.1

I have searched and tried many different things and still have not found a solution for my problem. Thus I am here.

Ideally I want to take a static mesh like a tree and fade it out if its in the way of the camera. Since the tree receives and casts shadows, I want to make sure the transparent material that is swapped to the tree also receives and casts those same shadows.

The problem is that I can't even make a basic transparent cube cast and receive shadows. I have set its material to Blend Mode: Translucent, Lighting Mode: Surface TranslucencyVolume. Then on the mesh in the world, I have set Volumetric Translucent Shadow to true.

The result I have with a single stationary directional light and the mesh set to Mobility: Static after building lighting is not receiving shadows or casting shadows. If I made the mesh Moveable which forced Dynamic lighting, then I can get it to at least cast a shadow, but not receive any. I was expecting to be able to both cast and receive shadows with both baked or dynamic lighting. How do I accomplish this?

P.S. I also tried setting World Settings->Lighting->Volume Lighting Method to Sparse Volume Lighting Samples as well as the default Volumetric Lightmap setting without success.

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Product Version: UE 4.19
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asked Apr 22 '18 at 08:48 AM in Rendering

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Syclone3D
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avatar image Stevenc94 Feb 28 '19 at 03:34 AM

Did you find a solution?

avatar image SebaSopp Apr 25 '19 at 03:14 PM

bump, need this too! Dynamic Shadows on a translucent Plane. Like a Shadowcatcher!

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2 answers: sort voted first

Material: Blend Mode: Translucent Two-Sided: True Lighting Mode: Surface Translucency Volume

Then for your mesh placed in the level select it. In it's Details Panel make sure that Volumetric Translucent Shadow is set to True.

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answered Sep 08 '18 at 10:27 AM

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Hlaing Min
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avatar image Haoris May 02 '19 at 12:45 AM

Form my test, it works but only with directionnal light set as stationnary. If set to movable, then all shadows casted onto the translucent material surface disapear.

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Hi, does this work with skylight (hdri) too or only with directional lights?

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answered Nov 28 '18 at 03:07 PM

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ron25
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