Hi @Sophie_Refshauge, indeed you aren’t able to set values greater than 1 for outline thickness. @will@vaios may be able to comment if this something that can be extended to support in engine/editor.
I’ve studied the shader code in engine for rendering the text and there is a private scaling constant factor that can be used to render thicker outlines in runtime (but not in editor). For the moment, as a temp workaround, you might be able to try increasing the scaling factor in a text element, something like this (haven’t tried it):
this.entity.element._outlineThicknessScale = 0.5; // default value is 0.2
this.entity.element.outlineThickness = 1.0;