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light up scene

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I can improve my X-Plane FPS by only drawing once instead of twice but at the cost of my texture getting darker. Seems simple but how to

light up the whole scene, can't figure it. I draw alike:


                            // draw vertex 0
                            glColor3f(rgb[0], rgb[1], rgb[2]);
                            glVertex3f(terrainMap[x][z][0], terrainMap[x][z][1], terrainMap[x][z][2]);


I tried glColor3f(rgb[0]+0.1, rgb[1]+0.1, rgb[2]+0.1);

and also added glColor3f(1.0, 1.0, 1.0); before glcolor.

Thanks in advance

Edited by FGFS

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It sounds like you are accidentally leaving alpha blending enabled. (If alpha s disabled, drawing twice would be visually the same)

Turn it off.

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