One common feature of late 19th Century middle class urban houses in Europe was the entrance staircase. In the usual manner of design, a kitchen and scullery occupied the streetside of the ground floor, the main reception rooms were therefore on the floor above the street level, the Bel Étage. Not one to conform, Horta took this "standard" and reinvented various aspects. Reorganising the groundfloor to give more space but also making the entry staircase a real feature piece. As one entered the building the double doors were swept open and the visitor was met with a stunning marble staircase lit from above by an ingenious light well, making it both light and welcoming, very different to the darkness often encountered inside the deep set terraced town houses.
It was always important to me to create that sense of welcome, the idea that you were entering something different. Though as in all my earlier attempts skills and tools both left me to make compromises.
Today I rebuilt the stairwell using a combination of Mesh Studio and Blender. Blender was required for the curved marble that could not be produced from prims.
However the purpose of this blog was not simply to track progress but also talk about physics. There is a lot of confusion over physics in mesh and how to define it, but simply defining it isnot the end of the story either. By default once you import the physics is not actually enabled properly.
The default mesh physics is something akin to taking your object and stretching cling film over it. it will tend to stretch from one extremity to another and not follow the shape you have lovingly crafted. This is what is know as a convex hull. Any mesh when first imported whether you have defined a custom physics model or not appears to have its physics type set to convex hull.
The better way, is to build your own physics model. Don't worry it is not scary and all you do in fact is exactly what you might have down with a sculpted prim and invisible prims. Create a model that matches the physics you wish to define. the simpler the better as each face will add to the physics cost of the mesh upload and therefore influence your overall LI.
The physics mesh is applied at upload time and cannot be tweaked later, it is important (and I discovered this the hard way) to ensure that the bounding box of the physics matches the bounding box of the model. If there is any disparity when the model are overlaid they will no marry up properly.
Now let's look at the results of applying a custom physics mesh using the viewer tools again.
I hope this helps a little, to explain the peculiarities of mesh physics.
Be careful mesh can be slippery at times.