The Rotate Around Point Niagara module does not account for current particle position

Rendering - Niagara - Oct 16, 2019

The rotate around point module no longer adds in particle position, so it does not account for other forces and modules effecting the particles, and will only spin in a circle by default. The user c ...

Niagara Systems are reset after changing the sg.EffectsQuality

Rendering - Niagara - Sep 24, 2019

Changing the effect quality from the console window causes Niagara systems to reset their visibility. Tested in 4.22.3(CL - 7053647), 4.23 (CL - 8386587), 4.24 (CL - 9023396) ...

Upgrading from 4.22 to 4.23 can break emitter inheritance

Rendering - Niagara - Sep 20, 2019

Copied emitters will have their inheritance broken when migrating from 4.22 to 4.23.  ...

Niagara crashes with skeletal mesh sampling in GPU system in Vulkan

Rendering - Niagara - Sep 17, 2019

Switching over to GPUCompute with Skeletal mesh surface sampling will crash in Vulkan. This does not occur with CPU sims or in D3D. When testing with D3D I would get the same Niagara compile warning ...

Emitters at display 3.4 in Content Examples Niagara map are not rendering

Rendering - Niagara - Aug 16, 2019

REGRESSION: Yes, did not occur in 4.22 In the Content Examples Niagara map, the emitters at display 3.4 are not rendering when at runtime. There were some fixes for this (or a similar issue) for V ...

Interpolators of Particle Dynamic Parameters Need "nointerpolation".

Rendering - Niagara - Aug 1, 2019

Regardless Niagara or Cascade, dynamic parameters for particles are passed to pixel shaders from vertex shaders via InterpolantsVSToPS. It can cause a precision error on some materials, for example ...

Adding Niagara system to a projectile causes a crash

Rendering - Niagara - Jul 29, 2019

Adding a Niagara system to a BP_Projectile in a C++ First Person Project  and then restarting it causes the editor to crash. Tested in 4.21.2 (CL - 4753647), 4.22.3 (CL - 7053647), 4.23 (CL - 744 ...

A Niagara system will only use one spawn rate curve when it has more than one emitter with different spawn rate curves

Rendering - Niagara - Jul 19, 2019

Systems that have more than one emitter that both have unique spawn rate curves will only used the most recently added emitter's spawn rate curve for all emitters. ...

Niagara Memory Leak in vertex buffer when increasing particle spawn rate on CPU sims

Rendering - Niagara - Jul 16, 2019

Increasing the spawn rate of a CPU particle sim will cause a memory leak in the vertex buffer.  ...

Niagara Mesh Particles do not face camera when using Camera Position facing mode

Rendering - Niagara - Jul 12, 2019

Niagara mesh particles will not face the camera when using camera position as the facing mode. The particles seem to face the direction the would if their position was at the origin. ...