Hello everyone,
I´m reaching to the community to please help me solve a problem I can´t work out. It should be a simple thing really…
I´m using the VehicleTemplate to ilustrate the following: I´d like increase/decrease a material´s instance value via UMG slider(say to emulate snow on a road or wetness on buildings). Now WHILE I CAN update/control the sedan´s color via silder I cannot do the same with any of the two actors in the scene 
(please see pic 1) File sharing and storage made simple
1 - I have a Sedan (a skeletalMesh Vehicle), a building called HistoricPawn (Pawn class) and an building actor class called HistoricActor.
2 - I´m using a ConstructionScript in the SEDAN+other two buildings to create a Dynamic MaterialInstance and than promote it to a Var to store it´s value
File sharing and storage made simple
Builing is set up the same way: File sharing and storage made simple
In the UMG Gragh OnValueChanged I SET that value in a Float(valueslider) than Get it to drive the SetScalarParameter Value nodes (with the relevant parameter names)
File sharing and storage made simple
2.1 The material´s values are driven by a Parameter (called ChangeMaterial) going into a Lerp node; The value in controlled by the UMG slider Float (called ValorSlider);
File sharing and storage made simple File sharing and storage made simple
Proof of concept Building MatINstance working: File sharing and storage made simple
3 - The casting to HistoricPawn compiles but always fails so it never talks to that mesh. I suspect that it has to do with type of object casting I´m using for both buildings; please refer to UMG_Slider_Settings.png link above , and cast to HistoricActor doesn´t accept any other type of object (GetController, etc…)
3.1 - Both buildings are Bprints actor/pawn respectively;
So what Am I missing in order to be able to change the building´s colors? :( is there any other way to get the slider to "talk" the meshes and their InstMaterials?
Could someone please help me put with this one? cause it seems simple but for the life of me can make work! Thanks in advance.
I´m including a download link to the project for anymone who whises to take a closer look: http://www.mediafire.com/download/6bbub0q35t4k4tn/Car_MatInstance.rar
