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"

'Stacking' bumpoffset

I've seen this method used to improve the bumpoffset effect, but I have no idea how to achieve it. The shaders in the starter content seem fairly complex. Could someone breakdown how this is done?

Product Version: UE 4.8
Tags:
more ▼

asked Jul 15 '15 at 11:07 PM in Rendering

avatar image

achr
13 2 4 8

avatar image Lovecraft_K ♦♦ STAFF Jul 17 '15 at 02:30 PM

Hi achr -

Can you be more specific of the effect you are trying to achieve? Pictures are always appreciated.

Eric Ketchum

avatar image achr Jul 17 '15 at 03:08 PM

I'm referring to the repetitious use of bumpoffset, which improves the effect of depth, as seen in the starter content material M_Cobblestone_smooth. But this material is too complex for me to breakdown.

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

1 answer: sort voted first

Hi achr -

Don't try to look at the material as a whole and figure out what is going on. Take a small section and follow the math that is being used as it goes through graph. You can right click any node and Start Previewing the node. This will show only the effects of the graph up to and including the previewed node. This will let you see what the effects of the nodes as you go. For the Cobblestone material there are a few "gotcha" moments worth talking about. The biggest one is the use of the Alpha Channel from the Normal map, if you look at the texture the Alpha is always one (White). The reason that it is used is the ability to pass the Height information from the Bump Offset to the Gradient Texture used to control the Linear Interpolates.

An ideal way to really understand everything in the material is to rebuild it section by section to see what each gives you.

Thank You

Eric Ketchum

more ▼

answered Jul 20 '15 at 05:48 PM

avatar image

Lovecraft_K ♦♦ STAFF
36.6k 703 260 737

(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