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impue4st9 [2023/04/14 13:46] – steph.jorgensenimpue4st9 [2023/04/14 13:46] (current) – steph.jorgensen
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 [[#wind|Wind]] is also now done in the material editor and is fully computed on the GPU, rather than relying on CPU-side components as in previous versions. This makes it easy to tune wind parameters inside UE, optimize rendering, and even change wind effect nodes all from inside UE. Wind for .st9 files also has fewer instructions than .st wind and does not require multiple draw calls for wind effects on different geometry types.   [[#wind|Wind]] is also now done in the material editor and is fully computed on the GPU, rather than relying on CPU-side components as in previous versions. This makes it easy to tune wind parameters inside UE, optimize rendering, and even change wind effect nodes all from inside UE. Wind for .st9 files also has fewer instructions than .st wind and does not require multiple draw calls for wind effects on different geometry types.  
  
-However, there may be times when you would still want to use the [[impue4|legacy .st pipeline]] instead of the new pipeline. Since the wind is done wholly on the GPU, it is harder to change the frequencies of motion. For instance, if the wind strength changes dramatically at runtime, and you wish to have leaves flutter faster, this would be more difficult in the ''.st9'' wind (and require some work in blueprint). But for most cases of steady wind strength, and even changing wind directions, ''.st9'' should be an easier, faster, and more configurable method of rendering SpeedTrees in UE.+However, there may be times when you would still want to use the [[impue4|legacy .st pipeline]] instead of the new pipeline. Since the wind is done wholly on the GPU, it is harder to change the frequencies of motion. For instance, if the wind strength changes dramatically at runtime, and you wish to have leaves flutter faster, this would be more difficult in the .st9 wind (and require some work in blueprint). But for most cases of steady wind strength, and even changing wind directions, .st9 should be an easier, faster, and more configurable method of rendering SpeedTrees in UE.