Hey all,
I have gone through the process of exporting a model from google’s sketchup and importing it into blender using collada 1.4. All is well with that process, the problem is that when I hit P to go into game mode the model disappears! It is there in edit mode nice and fancy, but invisible in game mode… see screenshots. Anyone have some idea of setting that is off or something? Thanks for input in advance.
this is probably because the normals are not correct.
What i can see on the screenshot is, that many Faces are double.
Try to recalculate the normals outside and remove doubles.
well I tried both of your ideas, “W > Remove Doubles” said “Removed 0 Vertices” and recalculate normals outside just made it inside out in edit mode as well as having no change in game mode. One thing I did notice is that while in “Shaded” draw type, the colors are there like in the above picture, but in “Textured” draw type, everything is light grey… images below. Does that help at all? Thanks for your answer and please continue to respond 
Eureka! Found the problem, apparently the imported object was parented to something called Model. I couldn’t find it in the Outline window, but when I went to the Object page in the buttons window and deleted it from the “Par:” field, it started showing up in game mode!
ok, nice!
I started with Sketchup Years ago, then i came to blender. This was one of the main reasons, because you never really know, what sketchup gives you out, tons of doubles and so on i had…
I recomend to model such things directly in blender. There is no disadvantage in blender, it ist far better than sketchup.
And Sketchup is not free!! Jes, you can download a free version, but if you want to have all features, you still have to buy things…
… but i dont know what is the current state of sketchup, for some purpose, it is still a nice software, and its much easier than blender at start…
ya, if blender started having referential alignment then I would only use blender. But I don’t like having to think about the dimensions of things, just get it close and sketchup will give you options to snap to the endpoint, midpoint, edge, surface, make square, make perpendicular, follow parallel, snap to last input distance or angle. I mean most of what I need can take advantage of one of those functions.
In blender this is all manual 
. You have to go to the object you want to reference, go into edit mode, select the vert or verts that you want to reference, move the cursor to that position, exit edit mode then snap and move your object or vert relative to the cursor. All that can be done for most cases in just one step if blender had sketchup like referential alignment.
Don’t get me wrong, sketchup has its own dis-favorable short falls. like the rotation tool that forces you to draw a surface for the tool to rest on before the tool will snap to one of the primary axises of rotation, that bugs me to no end! In blender you just hit x,y or z and you are done!
The main reason I still use sketchup for some things is I just can’t get used to missing my “right hand”!
