You should not be able to fall through ground or dash thru walls. Very thin objects may still be possible to go through, e.g. the grid border walls in GameMap.xml.

src/Engine/Collision/Collision.cpp

@@ -207,7 +207,7 @@ bool RayVsModel(const Ray& ray,
         glm::vec3 v0 = Transform::TransformPoint(modelVertices[modelIndices[i++]].Position, modelMatrix);
         glm::vec3 v1 = Transform::TransformPoint(modelVertices[modelIndices[i++]].Position, modelMatrix);
         glm::vec3 v2 = Transform::TransformPoint(modelVertices[modelIndices[i++]].Position, modelMatrix);
-        float dist = INFINITY;
+        float dist = outDistance;
         float u;
         float v;
         if (RayVsTriangle(ray, v0, v1, v2, dist, u, v)) {