A special use of the kill operator and customized pixel shader to simulate material dissolution or burning material.
Custom code is in the kill section. It can probably be improved, but it works as is.
PS : To render shadows correctly (to show the dissolve shadows too) I was forced to add a new parameters to the kill operator to be controlled with Vectors from ModMtrlEnv, so you need the last version to see disolved shadows too. Modification is on github.
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