soft opacity transition on shader

passerby

hello got a quick question im sure someone can answerer

iv been working on a quick shader for a similar effect to the bubble shield in the halo games

and im trying to figure out a good way to make the transition between it and the ground less harsh.

divi

http://udn.epicgames.com/Three/MaterialsCompendium.html#DepthBiasAlpha

this should pretty much do what you want.

passerby

divi wrote: »

http://udn.epicgames.com/Three/MaterialsCompendium.html#DepthBiasAlpha

this should pretty much do what you want.

thanks i will give it a try.

how does the depthbased alpha output it's inf could it also be used with a -1 to give things a hot edge where it intersects other objects too.

Oniram

id say maybe use a pretty loose (somewhere between 0-2.. though it may have to be negative) frensel component in your opacity.

passerby

Oniram wrote: »

id say maybe use a pretty loose (somewhere between 0-2.. though it may have to be negative) frensel component in your opacity.

hmm didn't quite get what you said there but the previous post got the soft edge i wanted.

feanix

Depth Alpha basically takes a bias to increase the softness. The heigh the softness the higher softer the transition. A bias of 0 should give you a hard edge. Be aware that theres a Bias field in the properties of the Depth Alpha node as well as the Bias input for the node.