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"

No Dynamic Shadow casting from large Actor


I am in the process of creating a visual simulation of planetary rings and have encountered a problem. My project uses only dynamic lighting as all actors in the scene are movable and actually move. My directional light is also set to movable.

The main issue:

The planetoid static mesh actor does not cast any shadow. Neither close dynamic shadow map, far dynamic, nor distance field shadow.

What I tried:

  1. Went through the Lighting Troubleshooting guide and tinkered with the values to reach what I wanted for the rest of the scene. While the values in the screenshot are mostly the default ones, changing them did not change the issue.

  2. Went through the whole dynamic shadow documentation, and tried Ray Traced Distance Field Soft Shadows. They do not help and they produce a lot of artifacts on my LOD meshes (that compose the opaque ring in the screenshot).

  3. Generate Mesh Distance Field for each mesh that needs to cast a shadow (still doesn't work for the sphere).

So, what can I do for this big actor to cast it's shadows? I would like to keep the lighting and shadows dynamic as the whole system will move and static lighting does not really make sens to my eyes. If however there is a way to fake the user into belief, I will take suggestions.

Solved (but what is wrong here?)

The mesh is indeed the problem.

Here are it's settings: alt text

What is wrong with it except the collision primitive (totally different for the starter content sphere)?

Here are the screenshots of my scene and the problem: alt text

Some details:

The asteroids have been set to not cast any far shadow. As you can see, the sphere does not cast any shadow on the black-ish monolith but the ring itself does (through the sphere).

The planetoid details and settings: alt text

And the movable directional light details: alt text alt text

Product Version: UE 4.15
more ▼

asked Apr 21 '17 at 10:03 AM in Rendering

avatar image

1 1 2

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

0 answers: sort voted first
Be the first one to answer this question
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