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"

Information about UE4 GBuffer

I'm pretty desperatly searching for information about the GBuffer, but just can't find any.

Things that interesst me:

  • How big is the GBuffer? How many bits does it uses per pixel?

  • How does the layout of the GBuffer look like?

  • Is it possible to make the GBuffer "slimmer" ?

  • What is r.GBuffer and r.GBufferFormat for?

I would very appreciate any kinds of info!

P.S.: Sorry if this isn't the right place to question.

Product Version: Not Selected
more ▼

asked Jun 09 '15 at 10:48 AM in Rendering

avatar image

204 15 26 34

avatar image MrRabbit Jul 10 '15 at 11:02 PM

I found in the ConsoleManager.cpp some clues:

  • r.GBuffer: 0=Do not use GBuffer (fast minimal rendering path), 1=Use GBuffer [default]. (However it caused artifacts which rendered the game unplayable.)

  • r.SceneColorFormat: (Interessting options which affects some of the GBuffer I think) Defines the memory layout (RGBA) used for the scene color. Affects performance, mostly through bandwidth, quality especially with translucency.

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

2 answers: sort voted first

Hello MrRabbit,

Here is an in depth look at g-buffers and how they work. First paragraph discusses how to choose the size of the G-Buffer.




more ▼

answered Sep 17 '15 at 08:46 PM

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

You would like to check out FSceneRenderTargets class and EncodeGBuffer function in DeferredShadingCommon.usf. You would get a better understanding on GBuffer layout. As MrRabbit said, you could slim GBuffer size according to your specific requirement. You must find a balance among performance, vram size and quality.

more ▼

answered Sep 17 '15 at 06:26 PM

avatar image

11 1 2 4

(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