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"

AnswerHub Maintenance

Background maintenance is scheduled to occur between 9 - 11am EDT on Tuesday, May 21. Site operation may be slower than normal during this time and a brief interruption in operation may be observed

Nvidia VXGI Specular Performance Issue

I there, I am using Unreal 4.18.3 with Nvidia VXGI. It looks great so far and runs very well. I do have one issue regarding my materials. I'm reworking my landscape materials to be more performance friendly. It is 4 layers, each with textures for diffuse, specular and normal. I also am using pixel depth to blend between large and small versions based on distance for close up detail. With VXGI specular enabled, my FPS drops to between 10 and 20 on my GTX 1080ti. When I disable VXGI specular tracing, it shoots up to 170 -180 as it should be.

Are there certain settings in my materials that I need to be careful of when using the specular tracing feature?

I realize that this is more regarding the use of VXGI, but I'm checking here as I know that at least a few of you use it.


Product Version: UE 4.18
more ▼

asked Apr 06 '18 at 12:17 PM in Rendering

avatar image

80 9 16 21

(comments are locked)
10|2000 characters needed characters left

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