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ParticleUVFlipping
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UE3 Home > Particle & Effects > Particles Systems > Particle UV Flipping
UE3 Home > FX Artist > Particle UV Flipping

Particle UV Flipping


Overview


Particle UV flipping provides the ability to control the UV orientation of a texture on a sprite in cascade. This allows for greater variation in appearance using the same texture and even works with sub-image textures.

Usage


Set the required Module to use Allow Image Flipping

props_allowflip.png

Image flipping is controlled via XY scale, a negative value will flip the UV in either direction.

  • X - Size Flip U
  • Y - Size Flip V

Checking the Square Image Flipping Forces the Y flip to use the settings defined by Y in the size module, with Square screen alignment where Y normally = X size. (Y is flipped by default if you flip X)

props_squareflip.png

Default Image Constant X, Constant Size (Square Alignment)

props_size.jpg

sprite_normal.jpg

Flip Image Constant in Negative X, Constant Size (Square Alignment)

props_sizeflip.jpg

sprite_flip.jpg

Flip Image Random X, Random Size Range X,Y (Square Alignment)

props_sizerand.jpg

sprite_random.jpg

If you want a random size, and you want to randomly flip use the UniformRange Distribution. 

Flip Image Random X Random Y, Random Size Fixed X,Y (Square Alignment)

props_sizext.jpg

It is possible to set a constant size, and flip Axis randomly using a Uniform Distribution with Use Extremes checked.

sprite_randxt.jpg

Insert Random Initial Rotation to get more variation

sprite_example.png