## FAQ - Preview

In preview by Direct3D or OpenGL, many problems arise caused by like a bug or compatibility of the video card driver. As reported problems are also mentioned on the home page, please see them together with the following points.

It is recommend to obtain the latest driver from the maker of video cards or chips and use it to avoid problems.

Q1. I cannot use Direct3D preview at all
Q2. I cannot use OpenGL preview at all
Q3. Application error or blue screen is occurred when Direct3D is used
Q4. Texture is not shown
Q5. Selection of alpha mapping in Material Property cannot work on 3D screen
Q6. Overlapped semi-transparent polygon is not shown correctly
Q7. Selection of bump mapping in Material Property cannot work on 3D screen
Q8. Background image is not shown
Q9. How to save preview pictures in the file
Q10. Vertices, lines or faces are not shown