diff --git a/panda/src/express/virtualFileMountRamdisk.cxx b/panda/src/express/virtualFileMountRamdisk.cxx
index 9f10931985..244f5c79df 100644
--- a/panda/src/express/virtualFileMountRamdisk.cxx
+++ b/panda/src/express/virtualFileMountRamdisk.cxx
@@ -235,7 +235,13 @@ open_write_file(const Filename &file, bool truncate) {
   if (truncate) {
     // Reset to an empty string.
     f->_data.str(string());
-    f->_timestamp = time(NULL);
+
+    // Instead of setting the time, we ensure that we always store a newer time.
+    // This is a workarround for the case that a file is written twice per
+    // second, since the timer only has a one second precision. The proper
+    // solution to fix this would be to switch to a higher precision
+    // timer everywhere.
+    f->_timestamp = max(f->_timestamp + 1, time(NULL));
   }
 
   return new OSubStream(&f->_wrapper, 0, 0);
@@ -275,7 +281,9 @@ open_read_write_file(const Filename &file, bool truncate) {
   if (truncate) {
     // Reset to an empty string.
     f->_data.str(string());
-    f->_timestamp = time(NULL);
+
+    // See open_write_file
+    f->_timestamp = max(f->_timestamp + 1, time(NULL));
   }
 
   return new SubStream(&f->_wrapper, 0, 0);
diff --git a/panda/src/glstuff/glShaderContext_src.cxx b/panda/src/glstuff/glShaderContext_src.cxx
index 94cef280d7..708347a119 100644
--- a/panda/src/glstuff/glShaderContext_src.cxx
+++ b/panda/src/glstuff/glShaderContext_src.cxx
@@ -1462,24 +1462,27 @@ reflect_uniform(int i, char *name_buffer, GLsizei name_buflen) {
         return;
       }
 #ifndef OPENGLES
-      case GL_IMAGE_1D_EXT:
-      case GL_IMAGE_2D_EXT:
-      case GL_IMAGE_3D_EXT:
-      case GL_IMAGE_CUBE_EXT:
-      case GL_IMAGE_2D_ARRAY_EXT:
-      case GL_IMAGE_BUFFER_EXT:
-      case GL_INT_IMAGE_1D_EXT:
-      case GL_INT_IMAGE_2D_EXT:
-      case GL_INT_IMAGE_3D_EXT:
-      case GL_INT_IMAGE_CUBE_EXT:
-      case GL_INT_IMAGE_2D_ARRAY_EXT:
-      case GL_INT_IMAGE_BUFFER_EXT:
-      case GL_UNSIGNED_INT_IMAGE_1D_EXT:
-      case GL_UNSIGNED_INT_IMAGE_2D_EXT:
-      case GL_UNSIGNED_INT_IMAGE_3D_EXT:
-      case GL_UNSIGNED_INT_IMAGE_CUBE_EXT:
-      case GL_UNSIGNED_INT_IMAGE_2D_ARRAY_EXT:
-      case GL_UNSIGNED_INT_IMAGE_BUFFER_EXT:
+      case GL_IMAGE_1D:
+      case GL_IMAGE_2D:
+      case GL_IMAGE_3D:
+      case GL_IMAGE_CUBE:
+      case GL_IMAGE_2D_ARRAY:
+      case GL_IMAGE_CUBE_MAP_ARRAY:
+      case GL_IMAGE_BUFFER:
+      case GL_INT_IMAGE_1D:
+      case GL_INT_IMAGE_2D:
+      case GL_INT_IMAGE_3D:
+      case GL_INT_IMAGE_CUBE:
+      case GL_INT_IMAGE_2D_ARRAY:
+      case GL_INT_IMAGE_CUBE_MAP_ARRAY:
+      case GL_INT_IMAGE_BUFFER:
+      case GL_UNSIGNED_INT_IMAGE_1D:
+      case GL_UNSIGNED_INT_IMAGE_2D:
+      case GL_UNSIGNED_INT_IMAGE_3D:
+      case GL_UNSIGNED_INT_IMAGE_CUBE:
+      case GL_UNSIGNED_INT_IMAGE_2D_ARRAY:
+      case GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY:
+      case GL_UNSIGNED_INT_IMAGE_BUFFER:
         // This won't really change at runtime, so we might as well bind once
         // and then forget about it.
         _glgsg->_glUniform1i(p, _glsl_img_inputs.size());
diff --git a/panda/src/gobj/texture.cxx b/panda/src/gobj/texture.cxx
index 1d46c1d900..4b3ac328e9 100644
--- a/panda/src/gobj/texture.cxx
+++ b/panda/src/gobj/texture.cxx
@@ -6232,7 +6232,10 @@ do_set_simple_ram_image(CData *cdata, CPTA_uchar image, int x_size, int y_size)
  */
 int Texture::
 do_get_expected_num_mipmap_levels(const CData *cdata) const {
-  int size = max(cdata->_x_size, max(cdata->_y_size, cdata->_z_size));
+  int size = max(cdata->_x_size, cdata->_y_size);
+  if (cdata->_texture_type == Texture::TT_3d_texture) {
+    size = max(size, cdata->_z_size);
+  }
   int count = 1;
   while (size > 1) {
     size >>= 1;