Why every mesh previewer in the engine shows a pitch black screen?

Development Rendering
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1

since yesterday anything in the engine that lets you preview a mesh , shows a pitch black screen . i mean Static mesh viewer , skeletal mesh viewer , preview window of the material editor , even physic asset editor , they all show a pitch black screen .
I know mesh is there , since i can turn on wireframe mode in static mesh editor , and see that the model is actually there , or i can turn to unlit mode in skeletal mesh editor and see the model , but in lit mode , everything’s pitch black !
When i place the mesh in the world , it is all well and good . but other than that , blackness .

Just for the sake of clarification , this is not a lightmap issue , since everything including skeletal meshes or static meshes shipped with the engine is black . anyone know what is going on ?
here is the picture of what is looks like :

notice what i have selected in the content browser , and what it is showing when i double click on the selected mesh . everything is pitch black except the grid ! it is just like the main light of the previewer is turned off somehow . is it even possible to turn off this light ? did i do anything that i’m not aware of or this is a bug ?

2

Hi ,

Have you tested this in another level or a new project? Also when you say, since yesterday, does that mean you downloaded 4.2 or it just started happening all of a sudden? If not, updating could fix the issue or uninstalling and re-installing the editor.

Thanks, TJ

3

Hi TJ

I have tested this on every map , even the market place ones , they all show black .
It just happened all of sudden . i had 4.2 preview version of the engine , but after reading your comment , i went ahead and upgraded to the latest version , and it solved the problem , now everything’s showing fine .

i guess preview versions are buggy ? i hope it never happens , it really makes you blind .

Thanks for the help .