Particles Facing Camera


I need to use Parray particle with square plane as particle type (Facing) and particle planes always facing the camera. I am planning to use a radial gradient in opacity to achieve a spraying steam effect. I couldn’t achieve the face mapping. I need each square particle to get a planar map.
Normally Standard material with Face Map selected works but in Scanline Render only. I use Corona Renderer.
How can I apply such mapping to particles?


preset flow - Fire Torch