cubemap:Error: Material "engine/occlusionproxy" uses unknown shader "Occlusion"

when i use the command buildcubemaps i get this error message--error: Material "engine/occlusionproxy" uses unknown shader "Occlusion" has anyone any ideea what could be the problem?

Do you have occluders in your map? If so, did you texture them appropriately?

What are those occluders and how do they need to be textured?

Occluders are block entities utilized to block models (regular brushes do not block VIS for models, as they will be visible throughout the entire map if you set the fade distance to never fade). Texture all sides of the occluder with "nodraw" texture and the blocking side to "tools/occluder" or something.

In addition, you have to tie it to the entity func_occluder. Don't forget this step, as it's different from using a hint brush.

well i have not use any occluders so far, that could be the problem, is it neccesary to use them?

hey dudes i need some explanations on these occluders . i have never heard of them so treat me like an inteligent 8 year old when u do explain something. THANX

May I suggest you read the Source documentation, it has all about area portals, occlusions and so on...

Also I use occluders in my map and I don't get this error but back when I didn't use occuluders, I got this error. Occluders are not exactly neccessary and I am sure that loads of maps do not use them, which you don't really need to if you are good with area portals.

I wouldn't worry about it.

but i can't build my cubemaps, i get that error , or how do i use those cubemaps? it should be some outputfile or something ?

do you have steam and the SDK fully patched?

Is your comp compatable with Dx 9? I also have the same problem.