I solved voodoo2 compatibility by 1: rename 3dfxvgl.dll to opengl32.dll and put it into application folder (driver is latest from 3dfx) 2: to show text, use Nehe Lesson17 method. Nehe Lesson 13 is not compatible to voodoo2 3dfx driver, so do not use Lesson13 method for voodoo2. 3: use direct casting to prevent implicit casting (voodoo2 driver is more prone to implicit casting problem than other drivers) Now it amazed me that voodoo2 run my openGL program faster than voodoo3. Tod

Thank you.

Good news.

Tammy