instance was not the right thing for me,

now it's working

MshViewer/Shader/TextureShader.vert

@@ -3,10 +3,6 @@
 // Input vertex data, different for all executions of this shader.
 layout(location = 0) in vec3 vertexPosition_modelspace;
 layout(location = 1) in vec2 vertexUV;
-layout(location = 2) in mat4 mvp;
-//layout(location = 3) in mat4 mvp;
-//layout(location = 4) in mat4 mvp;
-//layout(location = 5) in mat4 mvp;
 
 // Output
 out vec2 UV;