The WoodSmall effects include fire and small blast particles. The new Flesh effect is only the smoke, which is of less that half the density, is smaller, and lasts 1/3 as long. Therefore less obvious in all respects.
The stock code in House.class treats the Flesh Body type as supremely fragile, where in many instances it seems a single bullet can destroy the object. I've altered this, treating Flesh like the other Body types (such as WoodSmall), which requires more hits, making it more widely suitable.
For instance, I just now gave trees the Flesh Body type. And so now when a dense crowd of trees are taken out by a big bomb, instead of a great host of fires and smoke from the previous Wood or WoodSmall effects there is now a much subtler smoke only. It's always bugged me over the years when acres of trees would ignite from a single bomb blast, whereas in reality there would be essentially just stripping of foliage and branches--no major forest fire set off instantaneously.