[21: create a cabin]

Draw boundary curves, create Coons surface (FRONT WINDOW).

On Side view, draw straight line, Trim FRONT WINDOW with the line.

Extract edge, Mirror along X axis, and Translate it. Draw rail curves.

Create Coons surface (ROOF).

Draw straight line on Side view, Copy, Paste and Translate it outside.

Create Skin surface with the curves.

Intersect ROOF with the Skin surface.

Extract edge, Copy, Paste, Translate and modify it.

Create Coons surface (REAR WINDOW). Make sure that REAR WINDOW surface has complete intersection with REAR TOP surface.

Draw boundary curves slightly inside of FRONT WINDOW, ROOF and REAR WINDOW surfaces.

Create Coons surface (SIDE GLASS).

[22: check proportion]

Mirror surfaces along Y axis, shade model to check proportion.

I thought that the cabin is too square on Rear view. I should fix this later.

[23: create glass section]

On Rear view, draw front window glass cutting line.

Copy and Paste FRONT WINDOW surface.

Trim both of FRONT WINDOW surfaces. Keep exterior of one of them (FRONT PILLAR), Trim exterior of the other (FRONT GLASS).

Translate FRONT GLASS surface backward.

Extract edges on both of surfaces.

Create Skin surface between FRONT PILLAR and FRONT GLASS surfaces.

Do same actions for REAR PILLAR and GLASS surfaces.

[24: create REAR PILLAR SIDE surface]

Draw boundary curves, create Coons surface.

[25: create TAILLIGHT surfaces]

Extract rear end edges of REAR FENDER UPPER, LOWER, and SIDE LOWER. Do not extract at the same time. ->tips#6

Copy, Paste and Group them. Scale the group, Translate it forward.

Create 3Sides surface and Skin surfaces.

[26: modify cabin proportion]

Lattice deformation allows us to modify shapes even after we add details to the shape. This is one of great features of solidThinking.

Combine PILLAR , ROOF and GLASS surfaces.

Lattice-deform the Combined object. Make its top narrower on Rear view.

Uncombine to PILLAR-ROOF part and GLASS part. ->tips#9

[27: create wheel houses]

Draw front wheel house cutting line on Side view.

Trim FRONT FENDER UPPER and LOWER surfaces.

Extract edges on FRONT FENDER LOWER surface.

Draw section curve to create FRONT OVER FENDER surface. Start and finish on FRONT FENDER UPPER and LOWER intersection line.

Copy, Paste, Translate and Scale the curve twice.

Create Skin surface. (FRONT OVER FENDER surface.)

Group edges and the section curve.

Copy and Paste the group, Scale it, Translate it inside.

Create Skin surfaces. (FRONT WHEEL HOUSE RAMP surfaces.)

Paste the group again, Translate it inside.

Create Skin surfaces. (FRONT WHEEL HOUSE surfaces.)

Create end cap surface using FillPath or Skin tool.

Do same actions for REAR WHEEL HOUSE surfaces. (Skip OVER FENDER process.)

[28: create a wheel and a tire]

Open a New file.

Draw tire, rim and wheel center sections. Don't worry about relation to the body about their size or location.

Create Lathe surfaces around Y axis (TIRE, RIM and WHEEL CENTER surfaces).

Draw boundary curves. Create Coons surfaces (SPOKE surfaces).

Copy, Paste and Rotate them every 72 degrees around Y axis.

Create a Sphere. Copy, Paste and Rotate it every 72 degrees around Y axis.

Combine them, Intersect it with WHEEL CENTER surface.

Group Rim, SPOKE and WHEEL CENTER surfaces. Group it with TIRE. This kind of hierarchy should be created to help you to maintain object geometry and their materials.

[29: create an UNDER COVER surface]

Draw a section curve on Side view, Copy, Paste and Translate along Y axis.

Create Skin surface

Draw a boundary curve to cut Skin surface.

Trim the Skin surface with the curve.

[30: create HEADLIGHT COVER surface]

Create a Skin surface with 2 straight lines to divide HEADLIGHT COVER surface from FRONT FENDER UPPER surfaces. ->tips#7

Intersect the Skin surface with FRONT FENDER UPPER surface.

Copy and Paste Intersected FRONT FENDER UPPER surface, Delete body part of one of them, delete HEADLIGHT COVER part of the other. Now you have divided surfaces.