Hi there, There should be an error message in the manager and/or in the console window related to this. The issue is most likely that GPUI cannot find the instanced version of the shaders. For example, if you have changed the location of the folders or your shader files, this would create the problem you mention after an update since the references could be lost to the auto-converted shaders. As for the issue you reported for 1.2.1, the error should not appear in later versions. The tree proxy and hi-z occlusion generator shaders are now added to your builds automatically even if you don't manually put them.