Hi Ferdinand

Thank you a lot for the reply.

I am working on a render plugin (FStormRender) for C4D.
Cinema 4D environment is new for me (after 3ds max), but I am slowly adapting.

The biggest challenge is how to organize materials/shaders node system.
I'm trying to choose between a selfmade node system like Corona/Octane and Cinema 4d native one like RedShift.

Corona/Octane way looks more flexible, where you can connect any materials/textures to any pins (just avoid loop connections), but not native for Cinema 4D, and as you mention, it requires some creativity.

https://www.facebook.com/groups/FStormGroup/posts/3898598533769869/?__cft__[0]=AZZugQpbOWJ_AdMpyuHPFG_JdGzv7CGcFlz0RwNa4unC0f8gL0N9kP2ZTukclDy3O6uZVUBQrUqp5ll-84Ih8NPf3OhSEe1Xy8tVcdiGzNYB6p1xxebpa61zhal3jAbze46bXzf_riRQrXxD9sTVNk1wiBYA_ZCW8_aqRisa6N-yPUSVE4di7cmaQt--1kvKQ3AmpPF9nINgsCkI2vBO5BZn&__tn__=%2CO%2CP-R

Based on responses I guess I asked some nonsense.

Let me ask the question in a different way.

I have two BaseMaterials - Material_1 and Material_2.

Material_1 has a link to Material_2 in it's BaseContainer.

If I edit Material_2 and then press undo, it gets replaced with its copy, and Material_1 link is updated with a new Material_2.

Is there any message/notification regarding such link update?

Thank you.

Hi!

I am working on a material plugin (MaterialData).

Some materials may have links to other materials via BaseContainer links.

If I change linked materials, I want to update material preview of dependent materials.
For now I am catching MSG_UPDATE message in the linked materials and searching for all depended materials in the document and call

bm->Update(true, true);
bm->Message(MSG_UPDATE);
bm->SetDirty(DIRTYFLAGS::ALL);
EventAdd();

It works well until a user press undo.

In this case MSG_UPDATE message is not sent, only MSG_CHANGE. And even if I use this message to update the depended materials, their BaseContainer links are pointing to old materials (before undo).

How can I update all dependent materials in case of undo case?

Thank you