Sorry for the new post with same problem. I just realized that there is a visual effects section. I am using 2019.3.0f6 (was the same result in 2019.3.0f5). I create a default visual graph, and i drag into scene then nothing happens. I started the new projects with the HDRP option.(I remember trying to import to a built-in renderer, wasn't working either). If i download VFX samples, they are working, but i can't make my own VFX Graphs. I tried to assign rendering asset, zoom in/out, decompile tons of time, changing the default textures, tweak the size options, update the graphic card driver (GeForce GT840m). I couln't find a list or somethings that can block the VFX. What can be the problem ?