x

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"

Auto exposure speed settings don't work properly!

Hi guys.

It's been 2 days I'm messing with post process volume settings, and when I came to auto exposure, I noticed that 'speed up' and 'speed down' settings don't work properly (at least for me). I noticed that the 'speed up' setting is adapting quite fast, no matter how much you lower the speed (the change in adaptation is so faint from range 0.02 to 10). But the 'speed down' adaptation works way better except one thing which the behavior of 'speed down' adaptation is not as quite realistic as should be. When I enter a dark room from a totally light scene, instead of having a very short stop in full black and then a continuous adaptation, the engine prefers to keep the screen dark for quite some time and then suddenly start to gradually fade in (based on 'speed down' value).

I think the speed down adaptation should follow an equation like this: L=tanh(t*x-2)/(2+U) +(U+1)/(U+2) where t is time, x determines the 'speed down value', L is the percentage of the scene average brightness at full adaptation and U is a non-negative value that determines the difference of the average brightness of the two scenes which calculates each frame. Actually this is a mind equation but should give a good approximation.

I have set the scalability settings to cinematic and the method is set to 'auto exposure histogram'. I'm using UE 4.15 I hope you guys find a solution to this issue soon.

Regards.

Product Version: UE 4.15
Tags:
more ▼

asked Apr 19 '17 at 12:59 PM in Rendering

avatar image

navid100
1k 29 14 46

(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