Hi all! I have some problems about FBO. 1. I create a FBO object and attach 4 textures to it. After I used up them, Can I unattach one of them? Then I add another again,can I ? 2. Beacause FBO has the limit that its texture sizes must be the same. Can I create two FBO object to control the texture? ex: I create one FBO (texture sizes 300x300) and I create the other (200x200) Initial FBO , shader setting and give initial values into texture (200x200 and 300x300) I bind FBO(300x300) bind shader bind the other's texture(200x200) Can I do this? Finally, thanks to see them and hope to provide some ideas .^_^