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OjN
08-19-2015, 11:10 PM
Anyone has any idea how to use a flow map sequence to animate textures (via (uv displacement)? in the nodal material system of Lw.

Flow maps is used to give the texture sampler's UVs some velocity. Flow maps are well know in video games for water and some fluid simulations. I am interested in render fake fluids simulations animated with the flow maps painted by hand with Teck's flowmap painter, or with the liquify tool in photoshop. Also use geometry or use planes (there are some grass and clouds examples in this forum done with 3d textures over planes), procedural textures and alpha maps (sequences by morphed drawings).



An example:
https://www.youtube.com/watch?v=zRdEu0hkKi4

About flow maps:

Houdini to Unreal: https://dl.dropboxusercontent.com/u/15074979/Water%20Flow%20For%20UDK/Water%20Flow%20For%20UDK.pdf

Portal: http://www.valvesoftware.com/publications/2011/gdc_2011_grimes_nonstandard_textures.pdf
http://www.valvesoftware.com/publications/2010/siggraph2010_vlachos_waterflow.pdf

Others: http://graphicsrunner.blogspot.com/2010/08/water-using-flow-maps.html

OjN
08-19-2015, 11:13 PM
An example in videogames: https://www.youtube.com/watch?v=zRdEu0hkKi4

By the way I found an example in Fusion:

http://pigsfly.com/index.php?/topic/8176-ocean-whirlpool-effect/?hl=water

prometheus
08-20-2015, 01:59 AM
our long missed friend and lw guru Larry schultz (splinegod) has that covered in a tutorial, using textured filter in image editior I think, I believe it should be on youtube or in a forum thread somewhere in these forums, I know he covered that in a special topic about river displacement.

there´s also a whirlpool effect that I think could be of relevance, made by Greg Sullivan...
he is using particles to create a motion effect, which then is render out as image sequence and then used to drive the displacement of the geometry to create a vortex/whirlpool effect similar to
the pirates of the carribean movie.

https://www.youtube.com/watch?v=kFwxPU_BB8g

prometheus
08-20-2015, 02:06 AM
here´s a thread where splinegod is involved with some tips.

http://forums.newtek.com/showthread.php?127489-Using-animated-displacement-for-flowing-river

OjN
08-20-2015, 11:31 AM
Thanks a lot Prometheus! I am going to do some test this weekend. :)