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"

Bent Normal Compression, is blue channel needed?

https://docs.unrealengine.com/en-us/Engine/Rendering/LightingAndShadows/BentNormalMaps

In the UE4 example scene it appears from their Bent Normal thumbnail that they are plugging in a Bent Normal Map using Normal compression (which discards the blue channel). Is this correct, or should bent normals utilise Linear Color space & Default compression to retain the blue channel, or can UE4 recompute that direction on the fly like it does for tangent space normal maps?

My assumption is that the blue channel can be reconstructed since the epic example seems to be doing so, but if so is it incorrect to plug an RGB map into the bent normals input? The use case for this would be lower quality compression (BC1) but slightly lower memory usage overall for the Bent Normal.

Product Version: UE 4.19
Tags:
more ▼

asked Jan 18 '19 at 07:50 PM in Rendering

avatar image

Bek
31 3 4

(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