How to corrupt your landscape
When adding a Landscape as a actor in matinee, which makes it possible to animate its materials in matinee, the Landscape mobility settings will also be changed to moveable. But there is no mobility setting, at least not exposed in the editor, yet it gets changed and no lightmap rendered anymore for it. So you end up having no lightmap rendering anymore for it and there is no way to change it back. But you can now animate the materials including the landscape spline mesh materials but because of that issue that is not a solution for that problem: https://answers.unrealengine.com/questions/258216/animate-material-with-matinee-on-spline-mesh.html
asked Jul 15 '15 at 02:14 PM in Bug Reports
Although you have the ability to add the Landscape Actor to the Matinee, the workflow suggested and that works best is geared more towards a combination of Dynamic Materials being controlled through Blueprints. You can still use the Matinee to drive the controlling execution of the changing materials on your landscape, but keep in mind that if you are editing the materials of your landscape with lightmaps already applied, you will get weird results as changing the color of your surfaces affects the direct and indirect lighting.
You essentially create and call an event within Matinee that triggers the blueprint functions/events to change whatever dynamic materials or parameters you would like through the Level Blueprint or Blueprint Class.
Using this in combination with Timelines is the workflow that is moving to the forefront and Matinee is becoming less of a factor. Material Parameter Collections, Timelines, Custom Events, and Material Instances are the suggested workflow when editing the things you have mentioned at runtime.
answered Jul 15 '15 at 07:42 PM
I have ran into the same issue. However, I noticed that you can simply copy the landscape, and paste it into a text editor like notepad, and replace all "Mobility=Movable" with "Mobility=Static", then copy it back into the ue4 editor, and the problem should be solved.
answered Jun 02 '16 at 01:27 PM
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