gistfile1.erb

<% @billboard.photos.each do |photo| %>
  <div class="modal-container" style="display: none;">
	  <div class="modal-form"> 
	    <%= render :partial => 'photos/_sample', :locals => {:resize => 'true', :photo => photo} %>
	  </div>
	</div>
<% end %>

gistfile2.erb

<%= photo.inspect %>
<%= resize.inspect %>