Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

Office Holiday

Epic Games' offices will be on holiday from June 22nd to July 7th. During this period support will be limited. Our offices will reopen on Monday, July 8th. 

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.

alt text

alt text

Product Version: UE 4.19
trans1.png (531.8 kB)
trans2.png (854.1 kB)
more ▼

asked Apr 22 '18 at 08:48 AM in Rendering

avatar image

8 3 5 8

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!

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

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.

more ▼

answered Sep 08 '18 at 10:27 AM

avatar image

Hlaing Min
6 1 2

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.

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

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

more ▼

answered Nov 28 '18 at 03:07 PM

avatar image


(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question