I don’t know why I haven’t realized it before.
I was texturing a model of a building (as described in the real world scale uvw tutorial) and something didn’t work as expected. I had a 25×25 cm textures that simply looked huge when applied to the model.

I double checked and triple checked everything but still the texture mapping was wrong. Finally I noticed that the size of the gizmo of the uvw map modifier wasn’t correct compared to the building. At that point I realized that the building was modeled in a different scale, than it was scaled using the scale tool to match the real world scale.

In order to better understand what the problem is, open 3ds max and create a simple 10 cm radius sphere. Now clone it, and scale the cloned object using the scale tool. Take a look at the radius of each one. They are both 10 cm even though one is obviously bigger.
The same happens with modifiers, in my case the uvw map. Even though the size was set to 25×25 it looked nothing like that.

Needless to say that you should model everything at real life dimensions, but if you find must work on a model that was scaled here is the solution:

Select the objects that you need to “repair”, go to the utilities tab select “reset xform” and click “reset selected”.

I hope this was helpful.

2) Problem- You are trying to render a scene with camera correction modifier (3ds max and vray) but you keep having lots of artifacts.
Solution- Uncheck the “max compatible shade context” in the system rollout of the vray menu

3) Problem- You are unable to hit a high resolution render (in 3ds max) because you keep getting an “Error creating bitmap” message.
Solution- Save the scene, and exit max. Open max again, and render an EMTY scene with the desired resolution. After that, open the initial scene and hit render again. TA DAAAA… it works. Don’t ask me how is this possible though….

4) Problem – You are trying to render an interior scene (with max and vray), but for some reason the windows are black, although the light passes through them.
Solution – You have probably checked the “override reflection/refraction” by accident in the environment rollout of the vray menu, and left it black. Uncheck that and it will work.