I must have played around with the coordinate system but i didn`t think it was that important where its at in relation to my model to cause such problems.

Yeah i understood the thing about visibility but had no idea that my faces and groups associated with them ended on different layers, but now that you`ve explained it think i get it.

What i did before was to make the walls on layer 0 then group them send them to their layer and when i need to work on the walls i`d have the wall layer active and visible and draw the lines on that wall layer, i see now that was my problem.

If i understand right, when i need to work on my wall group thats on is on the wall layer i must make sure layer 0 is active with the wall layer visible and draw all lines in the 0 layer.

Thank you Dave for taking your time to explain this to me hopefully now i can finish my first model.

Thank you Dave for the quick reply and the fix,i don`t think i understand what you mean about the axes, i thought their set at the default,its just that i had moved the model around below the axes.

I have watched that video on layers and understand the video but dont understand how that leads to my weird surface thats not showing in either of the two layers independently but is visible when both layers have visibility on,the line that cant be deleted,or surfaces that won`t heal.

I was beginning to think its a display driver issue with all the weird artifacts but guess i have to go back to watching more tutorials

Thanks again.

Hello fellow Sketchup users, i am a architectural modeler thats recently discovered Sketchup and decided to give it a shot seeing how it looks much better than any other architectural modeling software i`ve seen.

Ive already watched a bunch of tutorials so i think i got the basics down,so this led me to my first project and needless to say ive already encountered some problems.

Problem 1 (pictures 1,2 and 3):
Attic exterior and interior walls are on their own layer,problem is there are 2 surfaces(on the front and back wall) that are not visible on either layer when you look at the layers independently but are only visible when you have both layers visibility checked at the same time.

Problem 2 (picture 4)
I get this error message when trying to heal some surfaces,or draw lines on the top of the exterior walls.

Problem 3 (picture 5)
Surface just won`t heal even tough all edges are coplanar.

Problem 4 (picture 6)
Some lines such as this simply can`t be deleted.

Ive been working on this project for over 20 hours and cant seem to get to the end of it.
If someone would be kind enough to help me and take a look at my model and tell me what is it that i`m doing wrong i would be very grateful.

MODEL.skp

![Line that just wont delete](/uploads/imported_attachments/ezDC_6.undeleteableline.jpg "Line that just wont delete")