…OvCore)

…manent solution has been found

…un automatically even if no source file changed (to make sure resources are copied properly)

* enforced single shadow map
* added support for PBR shadow receiving

…exposed to the material editor

…ny temporary TextureHandle (such as a ShadowMap) passed to a material will be released after use (to avoid accessing deallocated memory)

* Frustum culling can now be used in the editor to speed up the rendering!
* Frustum culling debugging now works properly (override frustum culling by using the main camera frustum)
* Still need to fix the light frustum culling (I think the implementation is missing)

…t culling as well as its debug feature