Unity - Custom Vertex Stream and Shadergraph/Amplify Shader

[Torbach]

wont work exactly as you are expect

• your passing alpha but it does nothing in the additive blend mode; forget connecting alpha, just use black color to control the fade as you normally do
• your two textures are multiplied but I suggest you invert the ramp [oneMinus]
• [subtract] a {value}* from this inverted ramp
• [clamp] between 0-1 after the subtraction
• now subtract this form the scrolling trail and clamp that output between 0-1 as well

animate opacity - you mean the custom vertex stream but you haven’t created a UV node to utilize the 3rd vector to pass into the particle system for it to communicate to the shader

Greetings, I'm starting in VFX

if you have 2018.unity use shader_graph… it will allow you to visually explore processing to re-create a scrolling trail or more technical stuff you use custom vertex stream to pass a value into the shader straight from Shuriken particle, however the setup for that is not documented verbosely ** i can help you here create a ‘UV’ node, then ‘split’ node AFAIK R,G are reserved for the UV, so you pass Blue or Alpha into a vector X (or Y, or X & Y) then that goes to a tile_offset and fi…

• attach a [split] out of the UV node so that you can access color blue

blue out = will be ‘Z’ in the UV node; i.e. Z & W are available for the cvs and this is the variable that the particle system will stream

• use the blue as that {value} I mentioned above

now when you expose Custom1.x and make a single custom_data_graph it will drive the strength of {value}, so a positive number will subtract the ramp into 0 and thus create no fade
while lowering the number negative will add to the ramp and cause it to subtract your scrolling trail