Fixed a bug where loading a project would not refresh properly the viewer.
Also the preview image on nodes now don’t take into account the alpha component of images
Clean EffectInstance::getImage :
- we don’t need to do a cache look-up because the renderRoI function will do it for us either way
Clean-up the cache API to prevent race conditions:
- Now Cache::get will always return a valid entry, either freshly allocated or retrieved from the cache.