When using depthbuffer with combined stencil (d24s8) created with GL.DEPTH_STENCIL, the DEPTH_STENCIL_ATTACHMENT should is used instead of setting them separately (#863)

h3d/impl/GlDriver.hx

@@ -1486,13 +1486,22 @@ class GlDriver extends Driver {
 			gl.framebufferTextureLayer(GL.FRAMEBUFFER, GL.COLOR_ATTACHMENT0, tex.t.t, mipLevel, layer);
 		else
 			gl.framebufferTexture2D(GL.FRAMEBUFFER, GL.COLOR_ATTACHMENT0, tex.flags.has(Cube) ? CUBE_FACES[layer] : GL.TEXTURE_2D, tex.t.t, mipLevel);
+		
 		if( tex.depthBuffer != null ) {
-			gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_ATTACHMENT, GL.RENDERBUFFER, @:privateAccess tex.depthBuffer.b.r);
-			gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.STENCIL_ATTACHMENT, GL.RENDERBUFFER, tex.depthBuffer.hasStencil() ? @:privateAccess tex.depthBuffer.b.r : null);
+			// Depthbuffer and stencilbuffer are combined in one buffer, created with GL.DEPTH_STENCIL
+			if(tex.depthBuffer.hasStencil() && tex.depthBuffer.format == Depth24Stencil8) {
+				gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_STENCIL_ATTACHMENT, GL.RENDERBUFFER,@:privateAccess tex.depthBuffer.b.r);
+			} else {
+				gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_STENCIL_ATTACHMENT, GL.RENDERBUFFER,null);
+				gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_ATTACHMENT, GL.RENDERBUFFER, @:privateAccess tex.depthBuffer.b.r);
+				gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.STENCIL_ATTACHMENT, GL.RENDERBUFFER,tex.depthBuffer.hasStencil() ? @:privateAccess tex.depthBuffer.b.r : null);						
+			}
 		} else {
+			gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_STENCIL_ATTACHMENT, GL.RENDERBUFFER,null);
 			gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.DEPTH_ATTACHMENT, GL.RENDERBUFFER, null);
 			gl.framebufferRenderbuffer(GL.FRAMEBUFFER, GL.STENCIL_ATTACHMENT, GL.RENDERBUFFER, null);
 		}
+																				}
 		gl.viewport(0, 0, tex.width >> mipLevel, tex.height >> mipLevel);
 		for( i in 0...boundTextures.length )
 			boundTextures[i] = null;