Shannon McSheehan - LoL FX + Knowledge Share

well your graph is doing something odd with the subtraction i can’t figure out why though…

look above at post #149

basics - OK picture more helpful right? i needed visual help with math to be sure it works

simple setup
pan == offset; you could mult one of em to make it pan different speed

output blend mode seem to be (Alpha blend)

SrcAlpha OneMinusSrcAlpha

*‘Saturate’ = 0-1 ; same as 'clamp’0-1 but can be optimized [depending on the GPU AFAIK]


Once again that for the help :+1::+1::+1:
This look wayyyyyyyy better. It may need some improvments to look more impressive but the base is here !


Hi Shannon, thanks for an amazing post! Bit of a noob question, but what was the process used to create the erode texture? Did you hand paint it and/or use different filters in Photoshop?

This post should answer your question. Imbuefx has some good videos as well. Dated but the technique are still relevant


Thank you! I remember watching the blood one, but didn’t think to link it to this. Haha!

Hiya Tash! I’m happy this post has been useful :smiley: I did hand paint my erosion texture with a lot of motion blur haha. I think the Kog’maw post might also have some heavy use of motion blur too. Here’s a little img one what the use of motion blur and transfer brush with pen pressure on can get ya! Also, if you ever want to test out what your erode will look like slap on a threshold mask in Photoshop!


Ahhh, thank you so much Shannon for taking the time to reply and for the image! Really appreciate your little tutorials and for making VFX more accessible to beginners. Going to try it out now. Hope you’re doing well!

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Of course! Happy to help ^_____^! I can’t wait to seeeeee

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On the topic of directional blurring, play around with the smudge tool and some interesting shapes as brushes You get great results from that :smiley:


Here’s the trail material I made using Shannon’s tutorial! I’ve also attached a picture of the shader as I’ve still not got a 100% understanding when it comes to making shaders yet and any pointers would be appreciated!


looks really nice even though i could imagine that it would be better to let the little highlights go with the direction of trail and not against it. right now the movement works a little bit against eachother in my eyes…

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Thanks Simon! Something felt off, but I couldn’t place what it was. I’ll change the movement for sure!

oh and it’s important to subtract the values to get the nice alpha erosion (and not just multiply). some posts ago a shader network shows how: Shannon McSheehan - LoL FX + Knowledge Share - #168 by Torbach


Ah brilliant! Gonna play around with it and see if I can make the improvements! Thanks again for your help…will be back soon(ish) with an update.

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You can also use Median under Filter>Noise>Median to help smooth out some of the sketchy strokes before using motion blur. Just keep in mind to offset the texture and touch it up if you want it to tile!


Wow I love that part about building trust, and the importance of not only communicating when things go wrong, but to keep up the communications more frequently to build a good relationship. I’ve been thinking a lot about this communication and trust at my new company and this seem to be so much true! It’s important to get to know each other to get an understanding of what everyones’ abilities are in the teams. In one scenarios it took months for me to realise a colleague could do so much more than I expected, and also enjoyed doing it.

Building up the knowns and unknowns is also an idea I will push to my team early on in a project. Thanks!

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Wuah! I love this thread, here are so many cool tutorials. Big thanks! I will try something out! :smiley:

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Updated the trail effect based on feedback and it’s definitely looking better (I think :sweat_smile:)

Cleaned up the shader too (saw @Luos_83’s material function:

Thanks @simonschreibt and @Travis for your advice :smile:


That’s really great! o smooth! Do you have some sort of break down image?

One of the best threads around here. I imagine you have helped me immensely! :blush: @ShannonBerke