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    <p><code>glBegin</code> must come after your texture binding functions in <code>Draw</code>:</p> <pre><code>glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); glBindTexture(GL_TEXTURE_2D, textureID); glBegin(GL_QUADS); </code></pre> <p>In the documentation for <a href="http://www.opengl.org/sdk/docs/man/xhtml/glBindTexture.xml" rel="nofollow">glBindTexture</a> it states:</p> <blockquote> <p>When a texture is bound to a target, the previous binding for that target is automatically broken.</p> </blockquote> <p>You'll also find that in the documentation for <a href="http://www.opengl.org/sdk/docs/man2/xhtml/glBegin.xml" rel="nofollow">glBegin</a> it states:</p> <blockquote> <p>Only a subset of GL commands can be used between <code>glBegin</code> and <code>glEnd</code>. The commands are <code>glVertex</code>, <code>glColor</code>, <code>glSecondaryColor</code>, <code>glIndex</code>, <code>glNormal</code>, <code>glFogCoord</code>, <code>glTexCoord</code>, <code>glMultiTexCoord</code>, <code>glVertexAttrib</code>, <code>glEvalCoord</code>, <code>glEvalPoint</code>, <code>glArrayElement</code>, <code>glMaterial</code>, and <code>glEdgeFlag</code>. Also, it is acceptable to use <code>glCallList</code> or <code>glCallLists</code> to execute display lists that include only the preceding commands. If any other GL command is executed between <code>glBegin</code> and <code>glEnd</code>, the error flag is set and the command is ignored.</p> </blockquote> <p>Because of this, in your <code>Draw</code> function, you're going to need to place <code>glBindTexture(GL_TEXTURE_2D, textureID);</code> and <code>glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);</code> before <code>glBegin(GL_QUADS)</code>. Otherwise, <code>glBindTexture</code> does nothing because it's within a <code>glBegin</code> and therefore <code>SecondBMP.bmp</code> is still bound to the target <code>GL_TEXTURE_2D</code></p>
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    1. COThank you very much! I've been looking through various tutorials for a while and I wasn't paying any attention already to the Draw code, thinking it was something in my texture loader...
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      1. USDanicco
    2. COHappy to help :D
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    3. CONot to forget, that there's not bracing glEnd to finish the drawing operation.
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