diff --git a/engines/wintermute/base/gfx/opengl/base_render_opengl3d.cpp b/engines/wintermute/base/gfx/opengl/base_render_opengl3d.cpp
index e602fd894bb..ca25aa0b04e 100644
--- a/engines/wintermute/base/gfx/opengl/base_render_opengl3d.cpp
+++ b/engines/wintermute/base/gfx/opengl/base_render_opengl3d.cpp
@@ -213,10 +213,14 @@ void BaseRenderOpenGL3D::displayShadow(BaseObject *object, const Math::Vector3d
 	glEnable(GL_TEXTURE_2D);
 	static_cast<BaseSurfaceOpenGL3D *>(shadowImage)->setTexture();
 
-	#ifndef __MORPHOS__
-	glInterleavedArrays(GL_T2F_N3F_V3F, 0, _simpleShadow);
-	#endif
-	
+	glEnableClientState(GL_VERTEX_ARRAY);
+	glEnableClientState(GL_NORMAL_ARRAY);
+	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+	glVertexPointer(3, GL_FLOAT, sizeof(SimpleShadowVertex), &_simpleShadow[0].x);
+	glNormalPointer(GL_FLOAT, sizeof(SimpleShadowVertex), &_simpleShadow[0].nx);
+	glTexCoordPointer(2, GL_FLOAT, sizeof(SimpleShadowVertex), &_simpleShadow[0].u);
+
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
 	glDepthMask(true);
@@ -721,11 +725,12 @@ bool BaseRenderOpenGL3D::drawSpriteEx(BaseSurfaceOpenGL3D &tex, const Wintermute
 	glEnableClientState(GL_COLOR_ARRAY);
 	glEnableClientState(GL_VERTEX_ARRAY);
 	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+	glDisableClientState(GL_NORMAL_ARRAY);
+
+	glVertexPointer(3, GL_FLOAT, sizeof(SpriteVertex), &vertices[0].x);
+	glTexCoordPointer(2, GL_FLOAT, sizeof(SpriteVertex), &vertices[0].u);
+	glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(SpriteVertex), &vertices[0].r);
 
-#ifndef __MORPHOS__
-	glInterleavedArrays(GL_T2F_C4UB_V3F, 0, vertices);
-#endif
-	
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
 	if (alphaDisable) {
diff --git a/engines/wintermute/base/gfx/opengl/meshx_opengl.cpp b/engines/wintermute/base/gfx/opengl/meshx_opengl.cpp
index 6381e52d75b..3dd2bc253d6 100644
--- a/engines/wintermute/base/gfx/opengl/meshx_opengl.cpp
+++ b/engines/wintermute/base/gfx/opengl/meshx_opengl.cpp
@@ -69,9 +69,15 @@ bool MeshXOpenGL::render(ModelX *model) {
 			glDisable(GL_TEXTURE_2D);
 			glBindTexture(GL_TEXTURE_2D, 0);
 		}
-#ifndef __MORPHOS__
-		glInterleavedArrays(GL_T2F_N3F_V3F, 0, _vertexData);
-#endif
+
+		glEnableClientState(GL_VERTEX_ARRAY);
+		glEnableClientState(GL_NORMAL_ARRAY);
+		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+		glVertexPointer(3, GL_FLOAT, kVertexComponentCount * sizeof(float), _vertexData + kPositionOffset);
+		glNormalPointer(GL_FLOAT, kVertexComponentCount * sizeof(float), _vertexData + kNormalOffset);
+		glTexCoordPointer(2, GL_FLOAT, kVertexComponentCount * sizeof(float), _vertexData + kTextureCoordOffset);
+
 		glDrawElements(GL_TRIANGLES, _indexRanges[i + 1] - _indexRanges[i], GL_UNSIGNED_SHORT, _indexData.data() + _indexRanges[i]);
 	}
 
diff --git a/engines/wintermute/base/gfx/opengl/shadow_volume_opengl.cpp b/engines/wintermute/base/gfx/opengl/shadow_volume_opengl.cpp
index 6859c883de3..163ac896209 100644
--- a/engines/wintermute/base/gfx/opengl/shadow_volume_opengl.cpp
+++ b/engines/wintermute/base/gfx/opengl/shadow_volume_opengl.cpp
@@ -133,11 +133,12 @@ bool ShadowVolumeOpenGL::renderToScene() {
 	glEnableClientState(GL_COLOR_ARRAY);
 	glEnableClientState(GL_VERTEX_ARRAY);
 	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+	glDisableClientState(GL_NORMAL_ARRAY);
 
 	// Draw a big, gray square
-#ifndef __MORPHOS__	
-	glInterleavedArrays(GL_C4UB_V3F, 0, _shadowMask);
-#endif
+	glVertexPointer(3, GL_FLOAT, sizeof(ShadowVertex), &_shadowMask[0].x);
+	glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ShadowVertex), &_shadowMask[0].r);
+
 	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 
 	// Restore render states